Oh well At least I got to clean o. Important Tips And Suggestions. Feb 21, 2013. First check is always the filter. Could be the pressure regulator, fuel pump, or a restriction such as a plugged in-line fuel filter, plugged tank filter sock, severely kinked hose or sticking tank selector valve. Fuel pressure regulator issues. Learn the common symptoms of a bad coil pack, how to test one,. #7 · Jan 25, 2004. Had fuel pump and sending unit replaced, fuel filter, map sensor, coolant temp sensor, EGR, IAC motor, TPS. Shop Fuel Pressure Regulators at Summit Racing. 7 L truck and after an oil pressure problem got fixed, I have it running and on the road but. SKU # 837548. Same engine and TBI. 8. Answered in 36 minutes by:Other than being annoying, you have normal operating pressure. 350 TBI. I have a high pressure fuel pump in my rig and i run 18psi through my 454 TBI on my 350 but i also have a custom chip from Brian. dieseling. You should check to make sure the regulator is doing its job. It’s a single compact unit that mounts atop the intake manifold in pretty much the same way as a carburetor — hence the appeal to automakers. Fuel should be coming out between the housing and the top plate. Run the lines to the inner fender and then a line over the engine to the carb. Location. CFM-Tech Adjustable Fuel PSI Regulator for GM TBI 2. 050 (around 235 degrees intake with 245 to 249 degrees exhaust) and excessively tight lobe separation (107 or. Mine could be different from yours. Testing fuel pressure on a throttle body injection system is similar to testing fuel pressure on an EFI multiport system. 7 L) with a 4L60E Trans. The. Product Q&A View Now. 2466 posts · Joined 2005. Use a fuel pressure gauge to verify that the fuel pressure is 12 psi for 502-4, 502-5, & 502-7. When fuel pressure regulators go bad, it reduces the efficiency of the main engine. The cost of replacing a bad fuel pressure regulator varies from the region, the type of mechanic, and the nature of the FPR. Fuel. consult the repair manual. 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. well, I got a fuel pressure gauge mounted right before the tbi, so I can watch the pressure and the spray pattern at the same time. Fuel Pressure tester kit used. Part Number:. It idles and drives fine except under real light throttle like in a parking lot, it seems to surge a little. -$115. Chevy Truck Tech Forums. Leave the fuel pump pressure gage on for at least 2 to 3 hours to see if it is losing pressure - It's a start. it should run from 9-14 psi. If you crank it up too much, about 20 it will overwhelm the injector and flow fuel all the time. once it warms up runs fine. When the engine is cranked and oil pressure closes the sitch 12v goes to the ecm on the same circuit that energizes the fuel pump. TBI pressure regulator spring question. TBIs are usually a tad lean when stock and only get leaner with more modifications. This pump supplies fuel pressure in sufficient volume to meet the engine's fuel requirement through all load conditions. 88 chevy 350tbi. Now, place a rag over the fuel incoming line (hose) and another rag over the fuel return line (hose). A fuel pressure regulator costs $30 to $200, and the average labor cost is $50 to $300. 030 over on the bore. The injector assembly also contains the pressure regulator. Fuel. The truck will idle all day but when I try to take off it sputters and misfires. Keep in mind that raising the fuel. As a result, you will get poor mileage. i hooked my gauge up right at the TB and i was getting 18psi, on the return i was getting (right from the fitting at the TB) 20 psi, and the pump will produce. jpg (130. VERY VERY LOW. I have a similar problem that I have been working on for 2 years and had a GM mechanic stumped for over a year. 3 Vortec fuel pressure regulator can save lots of trouble and give you a head start at solving engine issues. It will not do this again unless the ignition is switched off for at least 15 seconds. Symptoms of bad fuel pressure regulator. 5. Rcarter96 Discussion starter. 1995 gm tbi fuel pressure test with OTC's 4480 fuel pressure kit. 0L 5. TBI Fuel Problems 89' TBI 454 V3500. The symptoms of volvo d13 injector cup failure include fuel in the coolant, white smoke from the exhaust, slow engine start-up, and loss of engine power. 73 posts · Joined 2010. 0L or 5. Forums. If you want to get control of the spark timing a conventional HEI can be employed with the tach output fed to the computer. Trans-Dapt 2733 Tbi Open Spacer Chevy. Chevy 350 tbi fuel pressure regulator symptoms can include engine hesitation, stalling, and poor acceleration due to fuel starvation. After the engine is shut off, and before it is started, the IAC should open somewhat. 9. Lease Payments Under $350 a Month; Lease Payments Under $400 a Month; Lease Payments Under. 1. 4. Fuel Pump: On 4. Engine Malfunction. This is generally way too high for a carb. I have been working with a spring company to find an assortment of springs to replace the factory spring in the regulator. In about 10 minutes we diagnosed a faulty pump without guesswork. When it goes bad, the engine may hesitate, stall, and. #1 · Sep 14, 2017. +. When it goes bad, the engine may hesitate, stall, and. Read full answer. just my 2 cents. Fuel pressure issue. 28 posts · Joined 2010. Inspect for External Damage: Visually inspect the regulator for any signs of damage, such as leaks, cracks, or broken connections. 183 posts · Joined 2009. 7L 350 TBI with dual tanks. An expert who has achieved level 3 by getting 1000 points. There's also lots of variants of the homemade style online, and I'm sure someone has already. One thing I learned about speed-density systems (TBI or TPI), is that you cannot adjust the TPS. It may be necessary to monitor fuel pressure while driving the car at various road speeds and/or loads to confirm. Question about 1990 Chevrolet C1500. Our. cant get it to run right. You need to have about 12 psi running. 68 volts when I jumpered the fuel pump relay. Worked great on my Chevy TBI 350. Here is a picture. Re: 87 Chevy 350 TBI low Idle issue. When it goes bad, the engine may hesitate, stall, and have… Next morning I checked fuel pressure, lowest reading was 11. $4199. 1992 gmc jimmy 4. Remove a spark plug and examine the end of it. 10 gears 200K miles. com the video, 1A Auto shows how to remove and replace a faulty fuel press. V2500 Silverado Suburban. in order to work right. A Chevy 350 engine needs 8 to 10 psi of fuel pressure for proper operation. Some of the symptoms include: An illuminated check engine light. Engine won’t crank. 16 psi is to the high end but completely managed by the tbi fuel pressure regulator. please help ,. The engine control unit constantly monitors all the sensors in your car engine while you drive the car. This is the recommended pressure range for the tbi fuel system to function correctly. 3 psi (To do this with the Windows calc put it into scientific mode: View->Scientific. Hi allen, I think you will find that your normal pressure should be 60 PSI. 3 tbi. I. I've replaced the engine temperature control sensor. 65. cuz i have a 93 s10 with a 220 tbi and it has no fuel pressure till you turn the key to start it. New Fuel pressure regulator 5. Then when you try to start it, it cranks but wont fire. also after the engine is hot and parked for awhile it wont start it acts like it floods. High pressure pumps move a lot of fuel at 43 psi (port fuel pressures). It ran ok, but was in need of a tune-up. The fuel pressure regulator springs break. Check the vacuum lines. . 3L 5. 2 posts · Joined 2017. Its a 4. The impeller in the fuel pump will wear down with age (especially cheap Chinese junk ones) and more fuel will bypass internally. It is like standing on a ladder, and complaining about the height. Fuel pressure AND volume need to be checked. i. One method involves using just starting fluid and the other involves using a fuel pressure gauge. Hi guys, I've been having a problem with my truck for quite some time now. Rcarter96 Discussion starter. Part # FP10075. A sooty spark plug could just mean the engine is burning oil at that cylinder. Chevy 350 tbi fuel pressure regulator symptoms can include engine hesitation, stalling, and poor acceleration due to fuel starvation. Fuel related misfires can be caused from too much fuel. I have also experienced lack of low end power lately when I take off from a stop. The check engine. 5l fuel system the main question is volume. Zoom and Print Options. fuel pump,fuel pressure regulator,throttle position sensor, checked all. The key is to get the right kind of pressure regulator in place to drop the PSI to a level perfect. That's pretty cheap and easy to get. 7 Vortec Fuel Pressure Regulator Symptoms: Knowing how to detect a bad 5. . Last year, I installed TBI fuel injection by AFI. M. whats wrong?If yes, bad fpr, injector leaky and fuel pump check valve could be culprit. #1 · Aug 16, 2009. The retainer mounts on top of the fuel pressure regulator cover. TIP 1: You'll need a fuel pressure gauge to troubleshoot the fuel injector assembly on your GM 4. Install fuel pressure gauge between steel line and flexible hose. Poor fuel economy. TBI engines should not “diesel” (run-on) when shut off because there should be no fuel. #3. It has about 200k. CK5 has since expanded to include the classic C/K series GM Truck and Suburban as well as past and present GM models. This type of setup, which operates at relatively low pressure and locates the fuel. I need a diagram for a 1994 chevy silverado fuse box. This CFM-Tech Adjustable Fuel Pressure Regulator is a "must have" for stock and modified GM tbi engines. I was checking for. Will need a way to trigger the fuel pump to run. tested power at pump tested map tested egr and now am stuck. I had to redo. In my opinion. Here is a more detailed list of the signs of a bad or failing MAP sensor you should look for: 1. I have a 1988 chevy 4. How do i set timing on 1998 chevy truck 350 vortec. A fuel pressure reading within the range of 9 to 13 PSI indicates that both the regulator and fuel pump are functioning properly. Thick Layer on Spark Plugs. I've replaced the fuel pump, fuel pressure regulator in the throttle. motor is new . #1 · Aug 3, 2012. Put the 1996 Vortec EP381 pump back in. Replace it if necessary. 88's grizzly/spool, 39. James670X 1/2 ton status. The throttle body system sends fuel at a higher pressure than a carburetor needs, so the two aren't exactly compatible. Sent from my HTC One X using Tapatalk 2. 91 kg/cm 2 ), replace fuel pressure regulator (TBI 700) or fuel meter cover/pressure regulator (TBI 220). Save Article. Then check your pressure. Engine Size. 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. Vacuum and Pressure Tester Kit. Check for any fuel leaks around the fuel pressure regulator. Also when we were down there we replaced the fuel filter. . Though the fuel pressure regulator has several moving parts, the entire part is replaced instead of trying to find the exact point of failure among the moving pieces. I tried to be as thorough as possible. TBI fuel pressure ideally should be 12 to 13 PSIG on the feed side at the throttle body.