Chevrolet C2500 4x2: i have an 1988 chevy c2500 350 tbi (365,000 i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re. most likely your fuel pressure regulator,,, whe the fuel pressure regulator goes bad, it is worse when hot and after a short time of sitting then trying to start. No vacuum to the fuel pressure regulator. Testing the. The fuel pressure regulator springs break. Check the Vacuum Line: Detach. Only. 35 people found this helpful. . 200,000 MILES. Everything went smooth and it ran great. The fuel pressure regulator in a chevy 350 tbi controls the fuel pressure and regulates the amount of fuel that gets delivered to the engine. Fuel Pump: On 4. the 220 model tbi is different than all of the others because of this. ACDelco Professional 217-2286 Throttle Body Fuel Injector Assembly. Tighten gauge in line to insure no leaks occur during testing. Recently bought a used 92 Sub with 5. EGR SYSTEM CHECK. 0L: Automotive - Amazon. 7 Vortec Fuel Pressure Regulator Symptoms: Knowing how to detect a bad 5. 4. 3. it should run from 9-14 psi. Lease Payments Under $350 a Month; Lease Payments Under $400 a Month; Lease Payments Under. Fuel drips out of the tailpipe. Chevy 350 tbi fuel pressure regulator symptoms can include engine hesitation, stalling, and poor acceleration due to fuel starvation. ManufacturerBuy FUEL INJECTION TUNE-UP REBUILD KIT - TBI 295 1990-1994 GMC Truck C50-70 P41 4. Use the new gasket provided. A sooty spark plug could just mean the engine is burning oil at that cylinder. 2) Pump worn out or rotor not turning with the motor. dummy. Check the Vacuum Line: Detach the vacuum line from the regulator and inspect it for cracks or damage. 1987-1991 were still SLOW computers with tiny chips limiting what can be done with the system. 88's grizzly/spool, 39. Modifying the LT1 fuel system for third gen use. Hi all -- new to this forum because I have not had any problems with my Chevy van in tens of thousands of miles. Walker Products 255-1025 Fuel Pressure Regulator. I have had a series of issues with the conversion and for the money I’ve put into it trying to get it to run properly, I could have dropped a 350 in. #5 · Nov 3, 2010. if you have it you can see two lines for fuel one is bigger than the other. To increase the fuel pressure, turn the adjustment screw counter-clockwise. If the pressure is within the specified range, you can rule out the fuel pump. Posts: 355. e. . I am having low end power issues, along with backfiring until you get up to 3000 rpm. Replacing fuel pressure regulator typically costs between $100 and $500 including labor, depending on the vehicle’s make and model. 7L Except Governor. That should drip or run off the bottom of them. In this video, you will learn 7 symptoms of a bad fuel pressure regulator. 3 V6, teh FPR has no hose, its mounted inside the intakemanifold plenum where the entire FPR is exposed to vacuum. I've replaced the fuel pump. I would have liked to run the truck for a while with the fuel pressure gauge, but couldn't because the damn gauge kit was so worn and abused it leaked fuel everywhere. Been on quite the gremlin hunt going on a month. 1991. An incorrect fuel pump (hi pressure vs. The pump should run as long as the jumper is installed. then remove the vacuum line and your fuel pressure should go up about 10 psi and stay there. Check the fuel pressure. 350-3050. line showed the pressure steady, so that meant the pressure. Forums. i unplug the fuel pump relay. How do i set timing on 1998 chevy truck 350 vortec. Testing the. (2 years ago) I put a crate motor in it and haven't had it running right since then. Check for low regulated fuel pressure water in. However, these systems were primarily used in the 1987-1995 pickup trucks and so. The CARTER pump I had ag. How to check fuel pressure on a general motors truck and what easy checks you can do to diagnose a fuel pressure regulator problemcheck out my other videosht. The Spider injector system started in 96. Re: 87 Chevy 350 TBI low Idle issue. #5 · Nov 3, 2010. Fuel Pressure tester kit used. Fuel should be coming out between the housing and the top plate. To diagnose a bad fuel pressure regulator, follow these steps: Locate the Fuel Pressure Regulator: Pop the hood and find the fuel pressure regulator. If ya got a fuel guage hooked up and it has a bleed, crack it so it bleeds off fuel with the engine running. fuel pump for an SBC is about $12 as apposed to $50-$100 for an electric one. Generally the regulators don't fail. When it goes bad, the engine may hesitate, stall, and have…Each TBI comes complete with injectors, TPS, air control valve, and throttle body bushings. (not sure if yours has a schrader valve or not) check your reading while engine is idling, then rev the engine. 5L, 4. Not enough is typically weak fuel pump or low fuel. Basic tips on diagnosis and repair of GM's TBI system. Circuit Description: The ECM operates a solenoid to control the exhaust gas recirculation (EGR) valve. Normal TBI 350 (NOT T. 3L 5. 5psi. Have three erratic symptoms: 1) once warmed up and water flowing to block. On my 1995 GMC Suburban I've been having shuddering and stalling issues when I'm going in reverse doing a hard stop or idling in the Drive-Thru. First I start with a new Fuel pump, STOCK 75lph TBI fuel pump will only support about 230hp before the fuel pressure drops like a rock. Replace the line if it’s damaged. Fuel pressure issue. It is a 350 with over 200,000 miles on it. Here are different ways to check the operation of a fuel pump and a fuel pressure regulator. If you are using a stock GM TBI, then I believe the fuel pressure regulator is built into the throttle body. It drops to 37psi when you have it running, if you unplug the fuel reg. you can jump 2 terminals on the ALDL to turn the pump on, hopefully someone here knows which. Poor engine performance. I did replace the fuel pump with a Delphi unit about 30,000miles ago. The cost of replacing a bad fuel pressure regulator varies from the region, the type of mechanic, and the nature of the FPR. #1 · Aug 16, 2009. Reinstall the air cleaner spacer and the air cleaner. . The TBI unit, regulator, and return fuel line need to pass. -Static psi 120lbs. Turbo city actually markets an adjustable fuel pressure regulator for approx. 68 volts when I jumpered the fuel pump relay. First of all, remove the fuel pump fuse from the fuse box. Along with the erratic idle, the engine has absolutely zero power. Its a 4. The Pure Choice braided -6 Teflon line threads onto the adapter. pump due to low fuel pressure while running (barely 51 PSI). Earl's Performance LT Gen-V Oil Pressure Sensor Kits LT0004ERL. Free Shipping. Like you said factory spec is 9 - 13 PSI, preferably 11 - 13. In May of 1999 CK5 started out as a tribute to America's favorite 4x4 utility truck. Troubleshooting Chevy 350 TBI Fuel Pressure Regulator Symptoms. If you find a plug in this condition, check the rest of them. I have a 1992 Chevy C1500 4. 1) Verify voltage at the fuel pump connection. 1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4. And the air injection system was removed but the engine wiring harness wasn't changed (could be a problem)? Anyways, I've been through 3 different computers, it's currently running best on one from an '87. Could that be the pressure regulator on top. 5. pump should come on with key and build pressure and shut off. The correlation between fuel pressure and injector sizing is one of the most common mistakes in conversions. It has been going on from the. TBI pressure regulator spring question. This can be felt as misfires on acceleration or even at idle. Not Yet Reviewed. 46. . If not, Turn engine OFF to relieve system pressure. Check the Vacuum Line: Detach the vacuum. Hi, I have a 1997 Chev Tahoe, 350 (5. 3. 04 kB, 700x393 - viewed 820 times. Bad gm tbi fuel pressure regulator symptoms[solved]Fuel rail tpi port injection tuned pressure corvette exploded regulator autozone repair fig gm assembly engine injectors Tpi fuel pressureTpi gauge pressure fuel reply. IMPROVED A VISIBLE FLOW PATTERN AND COMPLETED THE JOB WITH OUTSTANDING. If one of these sensors’ values is out of the specified range, the check engine light will show up. I recently put on an Edelbrock high rise TBI intake, new TBI, 14 PSI fuel pressure regulator spring, new fuel injectors, deleted power steering, deleted A/C, and installed an electronic water pump. With TBI the fuel pressure only needs to be 10-15 with 12-13lb's normal. V2500 Silverado Suburban. CJeep77 said: WRONG - tbi is 11 to 14 lbs pressure stock! A stock tbi injector can go up to about 30 psi though:flipoff2: This is absolutely correct. Ok first things first, i bought this vehicle with this problem for dirt cheap. vortec injection system. Helpful 0 ;. If you need more help to. TIP 2: You'll be working around fuel (gasoline), which is extremely flammable. if all is good check see if PCM firing the fuel injectors. May also want to check the spark timing. Other bad fuel regulator symptoms include is fuel leaks from the tailpipe. Find GMC 5. By providing a ground path, the ECM energizes the solenoid which then allows vacuum to pass to the EGR valve. Next morning I checked fuel pressure, lowest reading was 11. 4. up thru 2003 on GM trucks. 3. motor is new . One thing I learned about speed-density systems (TBI or TPI), is that you cannot adjust the TPS. 1992 gmc jimmy 4. 44899) formulation offers maximum protection against sludge buildup, viscosity breakdown, oxidation, corrosion, and thermal breakdown while delivering excellent fuel economy benefits. Pressure relief valve for safe, clean testing. This item: ACDelco Professional 219-607 Fuel Injection Throttle Body Gasket Kit. it will start then stays on for a min then shuts off like ran out. Gasoline leaking is one of the most vexing fuel pressure regulator symptoms you can face in your vehicle. 74 Chevy: 350tbi/400/205, 60/14 4. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. fuel pump relay with another one that is known good. Put new distr cap rotor, map - Answered by a verified Chevy Mechanic. In this tutorial, I'm going to show you two different methods to verify if the no-start condition on your 4. . I did a TBI conversion on my 77 350, and from what I remember the return line was smaller diameter. check fuel pressure TBI injection fuel pressure should be 9 - 13 psi. I really can' tthink of any thing else. $98. Proper fuel line pressure should be between 9-13 PSI. Ship Date: Today. Fuel pressure regulator issues. take the vacuum line off the regulator and if you get gas out of. Quiet and long lasting, but weak fuel delivery. 7 tbi, my fuel pressure gauge is showing 8lbs of fuel pressure coming right out of the pressure line going to the throttle body, truck runs ok for the most part but im getting a lean code and the truck spark knocks alot under a load. Sometimes, a fuel pressure regulator can become stuck open, which means that it does not close properly. This answer was rated: ★★★★★. Every TBI will be Flow Bench tested, calibrated, and idle adjusted making it ready for easy installation. This would most likely be a failed pressure regulator (also pretty common). R. Then check your pressure. 73 posts · Joined 2010. 5 psi, but the stock fuel pressure is actually at 60 psi (22-23 #/hr). While idling it's not like a heavy misfire just randomly misfiring more like a light stumble and under load it feels under powered and sometime it's. It is like standing on a ladder, and complaining about the height. once it warms up runs fine. i have come to this lovely place so lets get down to it i own a 1992 chevy 350 TBI . During the late 80s and early 90s, TBI systems were used in a variety of different production vehicles.