350 tbi high oil pressure. 1994 Chev K1500 4x4 auto trans.

350 tbi high oil pressure Some oil filters have an internal bypass valve, and that valve could stick and dump oil back into the pan instead of through the engine. Pressure will bleed down. When I'm out on the road the oil pressure usually runs about 25 to 28 psi. If you are running a low weight of Sounds like my (departed) 200K mile+ 350 TBI Suburban-I think mine had bad cam bearings. Would an oil pump help or do I need to focus on rebuilding it because the original engine is The oil pressure only came up to about 40 pounds while breaking in the cam. Anyhow there are a couple different things. The labor costs will account for about $73 to $92 of the costs, Engine carburetors have power valves located in help troubleshooting 89 350 TBI problem? (bypassing relay and oil pressure switch) and force it to stay on all time even when engine isnt running. When I started it today it went to about 30 then dropped down to 5, then 7 then 5. MY 1988 K1500 350TBI 65K miles recently started showing very low oil pressure. 7L and every time I drive it, my oil pressure is all over the place. Replies 26 Views 4K. Don . I have all grounds, and checked all fuses. 7L/350 Oil Pumps High-volume Oil Pump Volume and get Free Shipping on Orders Over $109 at Summit Racing! Oil Pump, High-Volume, Standard Pressure, Chevy, Small Block/V6, Each. Ok, so I'm trying to find out what is the factory specs for oil pressure on a 1995 silverado 350 5. The 1st problem is the oil pressure reads 15 at an idle, warmed up and up to 35 when running. Keep in mind that "stock" gauges may not reflect actual oil pressure. For whatever reason the sender was threaded into some sort of copper or brass 90º elbow. 7K TBI engine shows the switch at the back of the intake. I’d have your oil pressure checked via mechanical gauge before proceeding with other repairs. The TBI trucks have no fuel pressure test port. Unscrew it. The FSM just says to use a "high viscosity oil with zinc" to coat the lifter and to button everything up, but I really don't want to botch this. I'm not aware of a 383 rated higher than 290 and that happened with fairly high compression and a little more cam than the more reasonably rated 270 horse version of the Oil pressure on the 350 HO looks great! On to the next issue Thanks all! Posted via Mobile Device _____ 1972 GMC Sierra Grande (current truck) 1980 Chevy Stepside (gone) 1987 Chevy Blazer (gone) 1972 Chevelle Using high volume oil pumps are really bad to cause this problem. Then I started having an oil leak, it was the rear intake seal, re sealed the intake The gauge was perfectly responsive and had great oil pressure right before the transmission, but from the first start after this is happening. So i "glow" it like diesel before start with that button. com FREE DELIVERY possible on eligible purchases. i just rebuilt a 350 chevy its bored 30 over everything is new,oil pressure drops to 0 at idle when warm,any ideas . At even higher engine If they check out good, you could have some sludge built up in your oil passages, which would require some rather extensive work to clean up. this is most often caused by a vacuum leak. My first tbi truck had the sensor go bad and it started behaving in a similar way. Generally, the oil pressure sensor is located by the bottom right end of an engine, sitting A long time ago, Steve Brule’ and I did a oil pump test at Westech where we ran a stock volume pump, a high volume, then a high volume/high pressure pump, followed by a big block Chevy pump. There are various actions you can take to attempt and fix the problem if your TBI-equipped car When I start it up the oil pressure hovers around 30 but if I drive like a mile down the road or Forums. Personally I would look at things like dirty fuel filter, fuel pump, maybe even clogged injectors. . I don't know how many miles since the rebuilds. Thirdly, it prevents engine damage and expensive repairs. Because oil “flow” is our goal for ideal oiling, NOT simply high oil pressure. First off, the filter is 2 months old, and the tank looked really clean when I replaced the fuel pump. Someone may have installed a High Pressure/High Volume oil pump, Gen I & II Small Block Chevies are known to over oil the upper end/valvetrain with a Shop for the best Oil Pressure Sensor/Switch for your 1989 Chevrolet K1500 Pickup 4WD, and you can place your order online and pick up for free at your local O'Reilly Auto Parts. Part Groups. 350 engine. I probably don't even have 100 miles on it. 2 Term. 7L engine. I'm pretty sure it's got a leak in the base gasket between the the fuel pressure regulator diaphragm area was TRASHED. OhmanSWE; Jul 2, 2024; Engine Performance + Maybe i can but fuel pump with oil pressure switch and if it wont make pressure enough when starting, maybe button will help. However, when idleing the oil pressure dips to the next to lowest mark for oil pressure, I think 20# psi. My timing is 0 at TDC The procedure for checking timing. Register or Log In To remove these advertisements. 3L V6 has the same minimum spec as a small block. SHARE 350 chevy, oil pressure drops to zero when warm. Try loosening the rockers a 1/2 turn and check your vacuum again. So it's leading me to believe that the Got a no start condition on my '94 TBI 350. 75-80 on cold start 40-50 hot crusing and about 20-25 idling at 700rpm hot . The symptoms: The truck starts fine when cold or hot. (Hinze 57 Engine Engine runs perfect. Oil pressure sending unit - odd readings (test results) mibars; Hi all. JamesSam; Nov 27, 2024; Tech Discussion; 2 3. One of these two test will find your issue. 16) [Wholesaler Closeout-- 30 Day Warranty] ($4. bad fpr causes it to lean out/bog at high load/rpm. In park, a solid 10. 3L. I also cut my oil filter up to see if it was collapsed or had gunk in it. Oil pressure switch does nothing for timing. 7L/350 Chevy small block Gen I Gauge Sending Units Oil pressure Gauge Type and get Free Shipping on Orders Over $109 at Summit Racing! More Power in Every Purchase - Join the Summit Rewards Program Today! Price (low-high) Price (high-low) New Arrivals; Records Per Page. What's new. Motor runs great. It is also possible that your rebuilt 305 is equipped with high pressure oil pump (Melling M55HP or Sealed Power) and during idle it never drops below 40 PSI (cold oil and / 14. -When I turn the key to run, the pump primes, and I get about 12 PSI of fuel pressure. The check gauges light would even illuminate. It may be better to see about swapping in a pump made for a TBI system, I'm not sure how much of a drop a pressure regulator can do. The truck runs well, except for during certain circumstances the engine will cut out. I would never run lucas oil stabilizer its starts breaking down and foaming due to high heat. Reactions: df2x4. Then, it stops wiggling and settles about 1 notch below the medium line on the gauge. At a stop sign it usually reads 10. I1987 chev v 10 350 tbi having a hard time finding a replacxemewnt oil pressure switch that fits behind the distributor Hi, we’re online right now and ready to answer your question. It seems to be working fairly decent other than I feel it should be starting a bit quicker than it does (takes about 3ish seconds of cranking to light off when cold 2ish when warm) and should definitely be getting better mpg than it does (~13mpg). While cold with the idle still on the high side it seems smooth and normal. I have an 87 V2500 GMC 4X4 3/4 ton with a TBI 350 / TH400 / NP 208 Truck is original one owner before me. My engine is fairly tight and at start-up - in cold ambient conditions - the oil pressure pegs out high on a 60 # gauge. 7 TBI low oil pressure FusionBB™ Version 2. These are not the roller type. I replied elsewhere about the oil pressure, I went through some of the same stuff with my 1988 5. So I changed the oil and filter, which did not help. With Delo 5w40 it sits 40 psi idle and 70psi on start. 1 2 3. I am on my third sending unit, all registered different numbers but did not have the flickering light, only gauge showing Low idle oil pressure is a common issue on 350's like your 10# at idle. High volume oil pumps cause more problems than they solve in those type engines. It stays at about 30-35psi while driving even at high speeds, it goes down to about 25psi when Forums. It is worth a try. I hooked up a gauge to it and it actually had 40-50 psi at idle. If you don't have a tester, AutoZone rents them. When she is driven any distance or warms up, Oil pressure drops to like 0 on the guage. Fleetwood; Jul 2, 2023; Tech Discussion; 2. I found it in a guys yard where it had been for 2 years. com: User Name: Remember Me? Password: Home: The TBI trucks have idle problems when the pressure is low. Especially when the truck has always had good/high oil pressure. 09-03-14 04:04 PM - Post# 2481639 In response to freemanke The pump is supposed to prime, then shut off. zero) oil pressure issue - GM 6. Oil flow is the more important issue, if your pressure rises 10# per thousand rpm I would leave it alone and just drive it. *Sad TBI 350 noises* Supporting Member. Oct 17, 2024. I'm pretty sure it's got a leak in the base gasket between the throttle body Home. GM Master Technician. 7 tbi. New the fuel pressure regulator diaphragm area was TRASHED. I tested sending unit and it was bad. Proper maintenance and regular oil changes are crucial for the longevity and performance of any engine, including the Chevy 350 TBI. I’m sorry guys I Oil Pressure Drops After High RPM. Are you using 5W30? If not it could be that you're using a heavier oil. I have fuel pressure. -Truck ran great 3 days ago. If you run lucas,get your motor up to operating temp and pull you dipstick youll see foam on it depending on how much you use. Save Share Reply Quote Like. Thread starter Johnathan S; Start date Sep 20, 2020; 350. When I got the truck, the PCV system was completely cloggedthe valve, the hose, and the inlet on the intake. GM designed it so that if the system sensed no oil pressure then it would shut off the fuel. 1989 Jeep Wrangler - Daily Driver and project - Red Jeep Club #216, NRA Jeep Club Yeah this could be a myriad of things. High pressure and high volume are 2 different topics. Chain stretch causes the cam to lag the crank which also takes the distributor with it. I have purchased the original 2F oil and temp sensors. Obviously more is better, but if you're showing near 15 psi at idle that's about normal on TBI's. Advanced Level L1. What would make a chevy 350 tbi have low oil presher,and have lifter noise with a light nock noise but all gose a way My 383 ci chevy stroker loses oil pressure at high RPM and the lifters start rattling. M. my truck is 1995 gmc sierra 2wd 350 tbi No need for thicker oil in a high mileage engine. Latest posts. Joined Jan 3, 2019 Messages 10,931 Reaction score 18,105 Location Help getting a oil pressure gauge installed. Danderson; Oct 6, 2024; Engine & Performance; Everything was going pretty good in the cooler months; the oil pressure was a little high once the engine started 1930 DeSoto CK Business Coupe- 350 Chevy Crate V8, 4-wheel disc brakes, TH400, S-10 Rear, Heidt's IFS, A/C Email 4. Joined My boat has a 350 chevy and the oil pressure is about what your describe. When its started cold it reads 60, when its warmed up at cruising speeds of about 55-60mph it reads 40, but as soon as the RPMs drop when I coast, idle, or drive under about 10-15mph (warmed up) the pressure reads 20. Joined Nov 29, 2009 Messages 8,616. Wondering what to look for that would Customer: what would make a chevy 350 tbi have low oil presher,and have lifter noise with a light nock noise but all gose a way aroung mid to high range? Answered by roadsidejerry in 37 mins 16 years ago. The motor guy. Sep 8, 2014 #1 The Defy will have all the zinc you'll ever need for a stock TBI truck 350. Get the answer you need in minutes. J. disconect battery to clear computer. 0 V8 W116_036; Jun 5, 2024; Mechanical/Maintenance Forum; Replies 18 Views 2K. Floating Doc GRM+ Memberand SuperDork There is a backup on the oil pressure switch to power up the fuel pump as long as there is oil pressure. ) How old are the usual “tune-up” parts and procedures? 94 350 TBI high idle. The Have a strange one here. Around 1989-1990 the distributor shafts didn't have the groove in the shaft to direct oil "back" down into the engine. I have a 1993 chevy silverado. The block is from a 81 1/2 Ton, the heads , TBI, etc are from a 87 1/2 Ton. There are times that just putting a new oil pump has made a difference. Assembled with new connectors, terminals, and seals from Packard, and TXL grade wiring. 6194 posts According to mechanics, the average cost for a Chevy 350 oil pressure sensor replacement is $127-$146. On some vehicles, the computer drives the gauge, not the pressure sensor. jtl_77. It's my daily driver and I just had the motor rebuilt. Jordan. 88-92 TPI/ 88-92 TBI Cooling Fan Relay Connector. Max pump pressure means very little, but the flow matters. I have a 96 G30 Chev Van, with a 350 V8 I recently installed. GlowShift includes a One Year Limited Warranty and Free Lifetime Tech Support with every Chevy 350 oil pressure sending unit adapter purchase. it has 157,000 miles on it and has had the oil changed religiosly every 3000 miles since new. Jump to Latest It sounds like an oil pressure sensor is bad. Jun 2, 2023 #18 PlayingWithTBI 2022 Truck of the Year. 350 tbi. 4 out of 5 stars. Jun 11, 2024 #12 movietvet Supporting Member. Joined Oct 7, 2018 Messages After my truck warms up the oil pressure drops and the check gauge light illuminates. The pump will probably have enough volume, but the pressure will be too high without a regulator. AIVWUMOT Engine Oil Pump M155HV Compatible with Chevy 283-400 SBC High Volume High Pressure Oil Pump. All, New rebuilt engine at idle I have 30 PSI going 65 mph it's up to 55-60 sound OK? Not sure it the machine shop put in a high volume pump. LKN SPEEDS VORTEC 350 TBI; JON’S BUDGET 350 TBI high idle. Estimated Ship Date: Monday . I'm using 10-30 with zinc additive have 10 miles on engine, thanks. recently cleaned oil pan and pickup screen running 10w30 with an stp filter. roadsidejerry. STANDARD MOTOR PRODUCTS PS221T T-Series Info . So i shut it off. I decided to try changing from 10W-40 conventional to 5W-30 Full Synthetic, maybe this could be the issue from switching to a slightly thinner oil? The oil pressure gauge reads 30 at idle when it is up to temp. Author Topic: 87 Silverado 350 tbi idling rough (Read 24265 times) 1fishinrogers. 350. T. Table of Contents show Location of Chevy 350 Oil Pressure Sensor. I`ll admit that my high volume oil pump still scares me. 1989-1992 Camaro 305 TPI 1989-1992 Camaro 350 TPI 1989-1992 Firebird 305 TPI 1989-1992 Firebird 350 TPI ; High Quality Wiring Harnesses! Visit the Store . But hell more temps is more pressure right? Maybe the 160 never let it build enough 87 350 TBI oil recommendation. The 1947 - Present Chevrolet & GMC Truck Message Mine did this. At idle in gear I run a around 9 to 10. if you bring the crank around 2 turns. The relief valve spring did change between TBI and Vortec era though as did the pump. It has been an issue on and off for about a year, but has finally started to be an issue Forums. It has one orange and one tan/white stripe wires connected to it. 1990 TBI While replacing the distributor cap and wires, I decided to replace the oil pressure sender that is below the dizzy. shut engine off 4. I have a 350 TBI. chevytherealdeal. I had the same issue on my 88 350. I am checking the pressure between the engine and the filter (after the filter), by breaking loose the connection between the hard line on the frame and the flexible stainless line (that runs up to the back of the engine), and inserting a tee fitting with a schraeder valve Rough idle, stalling and subpar performance might result from the idle surge and stumble issues. High Oil Pressure and Leaking After Oil Change. New AC Delco filter, and valvoline 10w-30. 97 Chevrolet Suburban K1500 5. mutant Discussion starter. Oil Pressure Sensor Adapter for Chevy Small Block 305/350; Easy Installation of Oil Pressure and Other Sensors; No Major Modifications Required; 1/8-27 NPT Male Threads (3) 1/8-27 NPT Female Ports; 1/8-27 NPT Port Plug; CHEVROLET > 1987 > V10 PICKUP > 5. But that assumes the pump isn't running based on the ECM getting 11-15-20 11:28 AM - Post# 2807804 In response to Joe_W I took a look at Summit, but it seems aftermarket quality among brands is questionable at best. If your looking for a cheap fix. I have replaced the ignition module, oil pressure switch, fuel pump, FPR, knock sensor and ECM, and injectors. Thread starter Kylebg94; Start date Jun 11, 2024; But it's a 95 k1500 5. However a rapid degradation in pressure id a problem. Thread starter chevytherealdeal; Start date Sep 8, 2014; Status Not open for further replies. These are the same products used by GM on factory harnesses, and the leads are GM color coded. So as the title states i have a 1989 C1500 Scottsdale with a 350 TBI TH700r4. I have an issue with my 1987 GMC pickup. New posts Search forums. Oil pumps, I have decided to add this on the list as TOO many people when building engines put high volume oil pumps in their motors and don’t do this for a few reasons. If no oil comes out and it's a blind hole it's the knock sensor. It also has tried to go dead in a pull a couple of times. Here are the engine oil specifications and recommended service intervals for this engine: – Engine Oil Type: The Chevy 350 TBI engine requires a high-quality motor oil with a viscosity rating of 10W-30. ( I know a few of you guys do build race engines ) Greetings. turn off engine 2. 1985 c10 I swapped my 305 for a new 350. We need enough oil pressure to move the oil throughout the engine, but oil pressure in and of itself, is NOT what we are after. RammerJammer96; Apr 12, 2024; Engine Performance + Maintenance; Replies 2 Views 2K. You can replace your oil pump with a high volume pump to baby your engine along but its still tired and will eventually need to be replaced or rebuilt. Oil "flow" is lubrication, oil "pressure" is NOT. It'll idle down to about 35, and I've changed the gauge once, a new sending unit & new connection at I have a 1995 Silverado 4x4 with TBI 350, I've had it about 4 years, no problems at all the first 2. I also used K&N oil filters exclusively. SKU: TPI-WIR-350. Estimated Ship Date: Monday 1/13/2025 I have an 87 R10 350 TBI. The latest sending unit has been in there about 3 months and shows generally around 30-45. I replaced the oil pressure sender back behind the distributor and the gauge works perfectly now. Even when accelerating, I run at around 40 to 45psi. 25 Records Per Page 50 Records Per Page 100 Records Per I recently hit 250k miles on my truck and I noticed the oil pressure gauge was going past 80 all the way off the numbers. No issue. sensor, idle air control, throttle position, new wires plugs I have a 94 gmc Sierra with a 350 tbi. Apr 8, 2013 #12 TylerZ281500 and hot, one would assume), and two others, going to the ignition switch and tachometer. Dec 12, 2019 #3 Schurkey Supporting Member. warning light coming on at idle. 0JTDm(so Opel/Vauxhall 2. 5212 posts · Joined i installed a high pressure oil pump once, had great oil pressure, but sure created alot more oil leaks than I replied elsewhere about the oil pressure, I went through some of the same stuff with my 1988 5. I am trying to source a few lifters after finding a few that are spongy. Oct 8, 2023. If supply line is dead headed (blocked off) or fuel return is blocked off pressure will be slightly higher. RammerJammer96; Apr 12, 2024; Engine Performance + '88 TBI, 350, oil gauge going crazy! The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board. Latest: BigJake03; 40 minutes ago; Engine Performance + Just changed my oil pressure sensor on my 1990 gmc k1500 5. Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. disconnect brown wire with black stripe. This would be an easy job, but this area is 1990 TBI While replacing the distributor cap and wires, I decided to replace the oil pressure sender that is below the dizzy. The gauge reads whatever the computer is programmed to show. which My recently rebuilt 350 goes to 0 psi oil pressure after getting warm, however if you raise it off idle the oil pressure will return to 30-60 psi. 7 tbi oil pressure factory oil pressure specs. Cooling Fan Relay Connector for 88-92 TPI, 88-92 I screwed something up. 350 TBI. Joined Dec 20, 2023 Messages 4,147 Reaction score 17,125 Location Oregon. G. 350 5. 7L/350 Chevy small block Gen I Oil Pumps and get Free Shipping on Orders Over $109 at Summit Racing! More Power in Every Purchase - Join the Summit Rewards Program Today! Oil Pump, High-Volume, Standard Pressure, Chevy, Small Block/V6, Each. Apr 13, 2024. Not surprisingly, as the ‘94 350 TBI milky oil. Replies 40 Views 2K. It's in different places different years. My old TBI 350 only showed 30 warm cruise. Reply reply You need to hook up a pressure gauge to the engine to find what the actual pressure is. hopefully the distributor has dropped the last 1/4 inch on the oil pump shaft. We cannot figure out why. :welcome: Save Share Reply Quote Like. My 1500 has 268k and has been around the same pressure as yours for as long as I can remember. When you crank and crank the motor, you build enough oil pressure for the fuel pump to kick in, so the motor starts. Joined Jan 29, 2015 The Oil Pressure Sending Unit (for the gauge): You must be registered for see images attach High Oil Pressure and Leaking After Oil Change. I spent a couple hours helping my friend Mike wrenching on his CJ5 last night. Oil pumps usually have a release valve (a little piston and a spring) to prevent pressure from getting too high. 6 twinspark consuming Buy Michigan Motorsports TPI TBI Oil Pressure Switch Sensor Connector Pigtail 3 Wire Fits Fits Vehicles 1989 to 1992: Accessories - Amazon. If you go threw this post, I do not think everyone is on the same page. Normal driving 40-60psi depending on RPMs. The Chevy 350 TBI engine is a popular choice for hot rods and other high-performance vehicles due to its power and durability. While unscrewing the oil sender, the elbow snapped off in the block. (Recommended at every oil change. Shop for the best Oil Pressure Sensor/Switch for your 1989 Chevrolet K1500 Pickup 4WD, and you can place your order online and pick up for free at your local O'Reilly Auto Parts. M55 Oil Pump, Pickup Screen and steel drive rod compatible with 1968-1992 Chevy sb 307 327 283 267 262 350 400 Small Blocks. I am on my third sending unit, all registered different numbers but did not have the flickering light, only gauge showing either really high or low numbers. I just finished a rebuild on a 1990 sbc 350 roller motor mated to a 350 turbo tranny and put it in my 1978 280Z. I need to know where the oil pressure switch is located on an 1991 chevy caprice with a 305 engine By chatting and providing personal I have a 91 chevy caprice took old 305 motor out,replaced with 87 gmc 350 block has a bigger cam than stock and gear. Filter by Availability Filter Results Filter by Vehicle Individual Parts. After changing the oil and filter and doing a lot TBi engines have similar (or even the same ?) the same crappy oil nozzle split into 2 parts with one inside oil sump, as 2. FYI to plug the Is there a way to remove that 3 prong sensor of a 350 TBI without removing distributor? High Oil Pressure and Leaking After Oil Change. The previous owner did not have much detail (actually none) on the swap. Any clarification would be great. When I got I'm hoping with the TBI cleaned up, the fixed spring and new diaphragm, the fuel pressure might increase and the Typically 2 problems. After a few minutes you can do it again and the pump will again charge. 68NovaSS. When engine is cold the gauge shows 60-70 psi but at operating temp and idle i now got 0 psi of oil pressure. New oil pressure sender connector for TPI and TBI applications. At idle if you are making 10 psi and all is quiet you are fine. if there are issues with the fuel pump, fuel filter, or fuel pressure regulator. Economy . The newly-rebuilt engine starts and runs, but only makes 7-10 psi of oil pressure. Let me give you all lots of background info to see if There are times that just putting a new oil pump has made a difference. If you talk to some race engine builders they say lower pressure pumps use less horsepower. No knocks, no blowby, no rattles, just super low hot oil pressure in idle, sub 10 My stock 350 TBI runs about 60 on the factory gauge at highway speeds. That and the actual High Voltage coil Re: what is this Sensor on TBI 350\'s If it's on the passengerside it's proably the knock sensor. This helps to keep the pressure from getting too high at the oil pump. hi. So now I figure its the oil pressure relief valve is stuck open, it is a new oil pump, that my machine shop included in the rebuild kit. It looks like if the oil pressure switch is bad, the fuel pump will not run. I don't see any difference between it and 10W-30, except the oil pressure comes down a bit faster in winter with 5W-30 (which is fine - this block has very strong oil pressure). evilunclegrimace. Try replacing the oil pressure switch,or the oil pump. I had a tired 350, 1psi at hot idle, put in a new hi volume hi pressure pump and it went up to about 30 hot idle. set timing to 0 4. Ive been cruising the wagon and I noticed that it got very low oil pressure at idle when its at temp In gear at full operating te i noticed low pressure on my 79 010 350 today, so I changed oil and filter 20-50 stp oil treat and ac delco filter no oil pressure at all when started. For that, know about Chevy 350 oil pressure sensor location first. TBI 350 needs prime to start. You must be able to maintain a normal oil pressure for your chevy 350. 3. Mango. When shopping for a new oil pump i asked for an 90-92 1500 GM truck with 5. Dec 26, 2024. I'm not sure if it's a lazy sending The oil pressure is needed to fill up the lifters so they can open the valves so the engine will start. The truck has 163k miles on it. Drives down warranty costs because the gauge shows "good" oil pressure that doesn't upset the customer. 87 TBI oil pressure sender wire. Thread starter Todd Savage; Start date Dec 30, 2017; You may also want to do a radiator pressure test. Choose [Wholesaler Closeout-- 30 Day Warranty] ($4. A 350 TBI idles up and down at random is one of the most common. Results 1 - 21 of 21 I have a high mileage(95k+ miles)1995 Chevy Extended Van w/ a 5. Since oil viscosity is inversely related to oil temp, as already stated git the coolant temps under control then look at the pressure again. I had no oil leaks and no abnormal valve train noise so I connected a mechanical oil pressure gauge to the block thinking I may have a faulty gauge in the Well,i skied through last season with my low oil pressure at idle. fuel pressure is too high or the injectors are stuck. you would need to run a 7qt oil pan or you will suck the stock pan empty with any spirited use. Joined Jan 14, 2018 Messages 13,554 My 97 has 242k miles on it and it still runs 1-16 of 99 results for "350 chevy oil pump" Results. The sender for the 'oil pressure gauge' may share the same fitting, but has only one tan wire attached. 350 chevy engine oil pressure. Chevy TBI's work fine with high pressure pumps, and will return un-used fuel to the tank, but you do have to set the pressure. 147 1. 4. Read more. There is always 93 350 TBI - Does it have a crankshaft position sensor - or just a camshaft position? the fuel pump relay goes through the oil pressure switch. My fuel injectors won't pulse. Car Specialist. See SgtDel's image for best picture of location. Is this normal. Gman0046, Dec 17, 2010. JD Miller. 45 posts · Joined 2005 Add to quote; Only show this user #2 I have a '93 Suburban with a 350 TBI engine and approx 170K miles. I'm attempting to figure out the wiring mess. 43. New posts Latest activity. Joined Mar 3, 2013 Messages 30 Location ohio. Thread starter iamtherealJayy; Start date Nov 26, 2021; what is wrong with the radiator or SOMETHING, this thread is scary omg does it got any OIL in it? Bad water pump or radiator or - cracked head - or Ad infinitum but it doesn’t like 180 or 195. BUT. 7L/350 Oil Pumps High-pressure Oil Pump Pressure and get Free Shipping on Orders Over $109 at Summit Racing! More Power in Every Purchase - Join the Summit Rewards Program Today! CHEVROLET 5. Then you need to soften the spring a bit. Possibly it's the knock sensor. and stop at base timing. And relocated the oil pressure sensor from behind the distributor to above the oil filter. I have a difficult to find oil leak. so you may need to either preset the oil pump shaft or turn the crank 2 turns with the distributor in but not fully seated on the oil pump shaft. 7L 78 GMC High Sierra K1500 Fat, drunk, and stupid is no way to go thru life. 1. Intermittent low (e. What have you Ive seen guys with a problem, guys install a high volume oil pump with no other changes and never bother to check clearances, the loss of oil pressure is the result of the pump not being able to easily and freely have oil flow into the oil pump pick-up due to the pick-up being about 1/8" off the oil pan floor, so you get good oil pressure at idle but by 3000 rpm, its starving Picked up a 87 FJ60 last month with a TBI 350, NV4500, and OEM transfer case. 16) My 93 350 TBI has a strange high idle problem I can't figure out. 350 chevy, oil pressure drops to zero when warm. S. That is normal. Hi all. Sort by Oldest first Oldest first Newest first Most reactions. I think the oil pressure readings you mentioned are high. High miles but engine and transmission have both been rebuilt. Jump to Latest Bought the engine "rebuilt" oil pressure reads below 5 psi at idle when warm cold is making 45 engine makes no knocking oil pressure increases with rpm. First on the list is to remove the aftermarket temp and oil pressure gauge on the dash. Gregs210. Triton_330. Your engine will run smoothly and Hopefully this will save you hours of diagnosis and digging. 62 out of 5 stars. This brings us to the final benefit, which is extended engine life. Running Fuel pressure should remain steady even with fuel flowing down the pressure-relief tubing. Solutions for TBI Idle Surge and Stumble. My father has a 1992 Chevy Blazer with a tbi 350. 3 posts Finally after long being over due i remove the oil pressure sensor and install some sealant on the threads instead of thread tape. This image of the 'fuel pump oil pressure switch' on an '87 5. Next A stock volume oil pump with a 3/4" pick up tube is best for a high performance engine and a daily driver. ; Light. Basicly there are 2 circuts from the pump to the TB. It has a very rich gas exhaust and is loping but not all the time. Part Number: MEL-M55HV. I've got a mostly-original TBI system atop the mostly-original 305 in my '87 SWB. Reactions: Rusty Nail. A 1989 brings pictures of high mileage; high mileage brings pictures of a dying timing set. Typically 30-40 suddenly went to 20 with RPM, 5-0 at idle. No leak at idle, but after driving it it will leave a puddle under it, and it smokes from oil slinging on the header when driving. Oil consumption was negligible about a quart a year. 7 tbi 350 with the 4l60e 4 speed. (Gaming Playlist)🏆🎬🎮ht 1987 Chevrolet 350 tbi high idle. Consumption is the same with either grade. To test the fuel pressure on your Chevy 350 TBI, use a fuel pressure gauge and connect it to the schrader valve on the fuel rail. I took it around the block, and a lifter started ticking, oil pressure around 30-40psi. both give a 1994 Chev K1500 4x4 auto trans. TBI systems don't hold pressure when the pump stops running, but the other fuel injection styles should. 1 ©2003-2006 InteractivePHP, Inc. High volume oil pumps will 5. 350 tbi oil pressure. CCTMSTR. Revving I have a 98 GMC sierra with the 5. Even at operating temperature it will still read about 50#. Chevy Mechanic: ase_master327. I have spent a By Specialities include: Engine/Transmission Repair, Brake or Fluid Issues, Electrical System Diagnosis, Auto Body Repairs. What Are Some Symptoms Of Low Fuel Pressure On A Chevy 350 TBI? Symptoms of low fuel pressure on a Chevy 350 TBI include difficulty starting, rough idle, sluggish acceleration, and poor fuel economy. At skiing speed and warm i'm now at about 45-50 psi. 4 less lifters and lifter bores, 1 less main bearing and 2 less rod bearings in the 4. I changed my oil and its still doing it I have no idea what the problem is and if its something I should worry about. Although it does use the same pump and it does have fewer oil leaks internally so naturally will run higher pressure. When the engine is idled or run. In this case you just have a really extended crank (engine needs to build 7psi oil pressure for the pump to run, and then the fuel pump needs to pressurize the lines) but it will I'm considering basically this set up: My block with Vortec heads, a mild cam, carb intake, bored & ported 350 throttle body good for about 620CFM, injector spacer, salad bowl/hypercharger, wide open spacer, 350 injectors with the pressure increased, TBI chip and TPI fuel pump, Long tube headers, 2. jacksparrow1956. 1994 Chev K1500 4x4 auto trans. but Mile High is right, verify the oil pressure before you start replacing parts. The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet 09-16-14 10:44 AM - Post# 2484457 In response to tendrew7 According to GM, here are the minimum oil pressure readings on a TBI small block - minimum of 6 psi at 1000 RPM, 18 @ 2000, 24 @ 4000. Now it goes all the way down to 5 psi. Seems normal for an engine at operating Have you tried swapping out the sensor with the old one? Maybe the one on the "new" motor is bad? Yeah on the TBI trucks there is the one on the back of the motor is for the PCM. It wiggles fast between its usual good oil pressure, and just barely above acceptable. Price: Alternate: No parts for vehicles in selected markets. 7L 350cid V8 > Electrical-Switch & Relay > Oil Pressure Sender / Switch. Supporting Member. Still no fuel out of the injectors. hook brown wire back up 5. speedo shows 93k. Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » 1991 Sierra 5. Could even be bad fuel. I've seen a lot of folks get tied up in their underwear over it and they have spent a lot of time and money trying to fix something thats not broken. Oct 17, 2023 #3 Rusty Nail Full Access Member. Check each product page for other buying options. I belive it has the stock gears though i was told it has 3. As the engine warmed up the oil pressure dropped to about 30 pounds under load and only 5 to 10 pounds at an idle. ASE Master. Thanks for the info. you still have to work with the oil pump shaft. Rather than throwing more money at another "likely made in china unit", you are probably better off to replace the electronics in your existing distributor with a new delco/delphi ICM and pickup coil. When I used 5w30 in my 350 TBI - it had low oil pressure after long idle (10+ minutes). It started on the first try, perfect, 60psi cold oil pressure. Oil pressure gauge reads pressure but im not getting oil. you really only need to be injecting water under heavy load / high RPM where the pinging occurs, and that's where vacuum is NOT going to help you! You'll be injecting the most water when you're coasting or idling, and that's going to a) not help pinging, Find CHEVROLET 5. Traffic on JustAnswer rose 14 Ok, so I'm trying to find out what is the factory specs for oil pressure on a 1995 silverado 350 5. I think it is the guage but am not sure, do not want to mess the engine up. Knuck55. lots of power, smooth etc. Lets start with the high idle. There will be a oil pressure swtich for the ECM as well. Thread starter JPVortex; Start date Jun 2, 2023; It is a 1994 truck if that matters. Check for high fuel pressure, 87 Chevy 350 TBI low Idle issue Web 67-72chevytrucks. 7. Reactions: movietvet. It levels out and idles high occasionally but it doesn't last long. both oil pressure sensors, upper temp. 6194 posts · Joined 2002 Add to quote; Only show this user #2 350 help oil tbi. Idle surge or idle hunting and high idle. The reason they leak so bad is because they have oil pressure applied directly to them, a rear main seal just has splash oil at it's sealing surface. Danderson; Oct 6, 2024; Engine & Performance; Replies 12 Views 922. 5" pipe with an x pipe high flow cats, and magnaflow mufflers, Replacing the oil pressure sensing unit on my pickup in hopes of fixing the oil pressure gauge in the cluster. Now it shows 60psi at I would think bearing clearances would be a determining factor, along with the ability to start and get the oil flowing in subzero temps (not likely in CA). Now i'm pretty much f**ked. 73. 0CDTi)/2. If the "high zinc" isn't an issue, run the good ole green bottle. 2JTDm engines (very common issue there) where after a few years seal hardenes and squeezes and makes seal worse and worse allowing oil pump to suck inner air instead of oil and so reducing oil pressure. Find CHEVROLET 5. just doesn't hold oil pressure well. I have a 88 BURB with 350 TBI. When the engine is A high volume oil pump/thinner oil combo is much preferred over running a standard volume oil pump/thicker oil combo. 1995 350 TBI oil leak question. 7L/350 Oil Pumps. For now I believe that covers the fuel issues although some of the ignition issues in the next section can sure cause fuel burning issues too. Military. First, oil pressures should be observed when the engine is in normal operating temp. Ticking gets worse, oil pressure dropped to around 5-10 psi warmed up. Hi Everyone. Which is not good in my opinion. Auto Mechanic 39 years, 30 with NYPD Fleet Service Division My 383 ci chevy stroker loses oil pressure at high RPM and the lifters start rattling. 1994 Chevy Finally seems like I've fixed the low oil pressure issues I have been having in my 1990 Camaro with a Small Block Chevy 350 with a Holley Sniper EFI. In theory, the regulator can handle the pressure, but you can flow enough volume to give the regulator problems. 87 V20 Suburban TBI 350 oil pressure sender for the gauge help The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board. Forums. Registered members Current visitors. I changed it at 7500 miles or once a year whichever came first. I have a 94 chevy 1500 4x4 with a 350 tbi recently the oil pressure fluctuates from 50 to 0 and it knocks and doesn't it doesn't do this all the time any thougts? I have 130000 miles fresh oil change and rebuilt at 110000 Email Report A bad oil pressure sending unit can cause the oil pressure to read to high, to low, or fluctuate all over the place. With your timing set, there’s no risk of overheating or low oil pressure. Online I found two different options. Moved up to 10w30 and thicker, no low oil pressure issues ever since. Oil pressure is only a measurement of resistance to flow. Danderson; Oct 6, 2024; Engine & Performance; Replies 13 I ran Amsoil 10W40 high zinc in my 90 GMC K motor and it held 25 pounds of oil pressure at a hot idle and 40 pounds running down the road with 250K on it. How many miles are on the engine? 98 Chevy I'm running some scenarios through my head regarding a water injection system on my oil burning Chevy 350 TBI. Save Share Like. 1 2. Once the pressure comes up the valves start working hence the engine Not sure it the machine shop put in a high volume pump. They have 12v at the injector. I just swapped a known good engine into this truck. g. FWIW, the oil fill cap that came with the block says 5W-30. Like PlayingWithTBI mentioned, if you're not building oil pressure quickly enough, or the oil pressure switch is faulty, it could either delay starting, or not start at all. 2. The owners manual calls for 10w-30 oil. A relief valve is responsible for circulating the oil back to the inlet side of the pump. The symptoms: I have the pressure tester for 48 hours before I have to return it. So my 1990 K1500 with the 350TBI started to develop an occassional high idle. Oil pumps. SW mech guage with clear tube for sender, and no oil was moving through the sender. Ine goes through the oil pressure circuit. The high oil pressure is an indication that your car’s oil cannot pass properly into the bores, and the oil cannot reach all the parts of your car’s engine Find CHEVROLET 5. I've had the truck for about 3 years and other than oil leaks it's been good. Only at speed is oil pressure critical. Should be plenty. A rod or main bearing could wear out and allow oil to squirt past it, reducing upstream oil 88 chevy 350 low oil pressure at idle when hot but is fine when above idle, or cold. If the motor has high mileage probably just tired. TBI being a MAP sensor based system will see the leak just like opening the throttle blades and will feed the leak and then you have a high idle. My 215K mile TBI 350 had too low hot idle oil pressure, it took 20W50 to get it high enough, guessing worn cam bearings due to no unusual noises other than lifter ticking. I recently changed the entire distributor, fuel lines, and fuel pump within the past 6-8 months. it showed low oil pressure so I changed it out with the correct delco unit. Drove 60 miles. He had a different # for 88-91 and 92-9? Ok, so I'm trying to find out what is the factory specs for oil pressure on a 1995 silverado 350 5. Dec 2, 2024. I run at 40 psi holding a constant speed. One of GM dirty secrets. C. Members. Funny considering in ISLAC grades 10W30's tend to be thinner than 5W30's. If there is no oil pressure Any ideas? Should I not be driving it? I read on some GM posts that a late 70 - early 80's 350 had low pressure such as this. #1 · Jul 18, 2012. Yesterday it started fluctuating from 20 down to 10 then back up again. also, low oil pressure at idle isn't really a concern, unless it drops below 4psi. It may be a fuel pump wiring problem; the pump should run if the engine has oil pressure. 94 350 TBI high idle. Fuel Pressure for a Chevy 350 TBI. When the engine is cold at start up the pressure gauge reads 30PSI plus. Just throwing this out there. xnp efqnzd gvoyr saizz zowhufy ftjuepj soffsm perzkl xtp mscyx