Earl's Performance LT Gen-V Oil Pressure Sensor Kits LT0004ERL. Oct 14, 2009 • 1989 GMC Suburban. You should also be able to use this write-up as a guide for basic TBI overhauls or fuel injector replacing. 5" Iroks, 64's, hydro assist, etc. 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. Drove 60 miles. Anyway, I'd like to rebuild and/or replace the fuel pressure regulator diaphragm, and possibly the spring, on a 220 TBI unit. I have been working with a spring company to find an assortment of springs to replace the factory spring in the regulator. Fuel Pressure is critical for proper operation. That should give the pump time to kick the system pressure up and it should then start without a lot of cranking. As for a fuel pressure regulator, my fuel system does not have one and the pump is designed for a tbi system with 15 psi. But first, I will quickly review what a fuel regulator is and how it works. The fuel pressure regulator is set for approximately 12 psi (30 psi on '94 & '95 BBC trucks). Fuel Pressure Regulator, Chevy, GMC, Hummer, Pontiac, Each. When I swapped the injectors from the 350 over to the 305 throttle body, I turned the fuel pressure adjustment up quite a bit. Check to make sure your check engine light is not on, or that it is on with the key on but the engine is not running. A Chevy 350 may run poorly when warmed up due to heat-related ignition system issues, vapor lock, malfunctioning sensors, intake manifold gasket leaks, fuel delivery problems, vacuum leaks, or cooling system malfunctions. It may be necessary to monitor fuel pressure while driving the car at various road speeds and/or loads to confirm. I was checking for. It may be a weak coil or possibly weak spring pressure of the rotor. Delphi Fuel Pressure Regulator FP10075. The pump will want to throw 10-12 at it. #7 · Sep 12, 2014. Also when we were down there we replaced the fuel filter. To diagnose a bad fuel pressure regulator, follow these steps: Locate the Fuel Pressure Regulator: Pop the hood and find the fuel pressure regulator. Then check your pressure. 3L 5. JET Adjustable TBI Billet Fuel Pressure Regulators 61500 Fuel Pressure Regulator, 10-20 psi, Chevy, GMC, V6, V8, Each. If it is reading over about 12 psi then the regulator has at some point been changed from the factory setting. hook up a fuel pressure gauge and see if the pressure drops when the motor falls on its face. Problems with vapor lock are most common on older vehicles that have a carburetor and a mechanical, engine-driven fuel pump. The Chevy 350 TBI is designed without a dedicated port for fuel pressure testing. Been on quite the gremlin hunt going on a month. Indmar s495126. First off, 1988 350 tbi fully rebuilt kept it stock other than . Location. 7. Fuel Pump: On 4. Used distributor stem with used cap and rotor and pick up coil or whatever the name is of the third part on the distributor Fuel pressure in line is good1335 posts · Joined 2007. 0L & 5. 6. If it is getting clogged then it will exhibit the same symptoms. Order yours online today and pick up from the store. Large, easy to read 0-60 psi scale. But it idled fine and would die out if I gave it much gas. Since the truck has been sitting, you may have some corrosion in the regulator and the injectors. never had a problem with it before. 1995 5. Hello, my name's Ryan, new user with my first square body. The ECM controls the fuel pump relay. An expert whose answer got voted for 500 times. Fuel related misfires can be caused from bad fuel. Key on engine off should be 55 to 62 psi. However, these systems were primarily used in the 1987-1995 pickup trucks and so. SKU # 203277. -Max running 43psi. Item Number: 500-100. 04 kB, 700x393 - viewed 820 times. In tbi trucks, I look for 12-14psi and 2 quarts of volume with the engine running. I'm thinking it's a distributor problem since it's not sending a signal to the comp to keep the injectors firing. 5. First fuel pressure. Product Q&A View Now. My Web Site--darbys Elky. cuz i have a 93 s10 with a 220 tbi and it has no fuel pressure till you turn the key to start it. Buy Throttle Body Shop TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring:. if you can what kind of tbi, year of your truck. Vacuum and Pressure Tester Kit. Code P0300 is. Fuel Pump & Pressure Regulator Fittings; Tee & Y-Fittings & Distribution Blocks; Hose Barb Fittings & Adapters. It was only running around 9 psi. jpg (130. Add To Cart. Idle will be unstable and rough. Fuel pressure under all running conditions is always 12-13psi. What else could I do? Answer: Check the fuel system pressure. 2449 posts · Joined 2003. If you suspect the fuel pressure regulator is leaking, then just be sure to check it before replacing it. View Details. When it goes bad, the engine may hesitate, stall, and. 7L 350 TBI with dual tanks. Fuel related. Check for any fuel leaks around the fuel pressure regulator. Worked great on my Chevy TBI 350. 1987 chevy truck tbi 350 , injectors shooting irractically, drip fuel , replaced pressure regulator and throttle position sensor . The fuel pressure specs. 10 gears 200K miles. For the price of all those things you want to change, fix the TBI setup you have now, and be all the better off. There's also lots of variants of the homemade style online, and I'm sure someone has already. 0/5. #5 · Nov 3, 2010. Wrecked the family car and its all we got now. Joined Nov 15, 2002 Posts 122 Reaction score 0 Location. Indiana. 2. This also eliminates a fuel injector issue. Not sure if you have dual tanks, if so a good check to isolate to fuel pump is by switching tanks. Re: Only 7psi fuel pressure; 89 350 TBI, pump? 08-12-05 04:45 PM - Post# 759285. I am running a tbi Chevy with factory regulator (at the throttle body), the pump I am running is a 55psi Toyota pump. Make sure the injectors do not drip fuel when it is shut off. 2. With TBI the fuel pressure only needs to be 10-15 with 12-13lb's normal. Check the fuel connections for leaks. if it is higher look for a restriction in the return line. 9-13psi on the fuel, if it is low then find a hose that you can pinch off on the return side and if the pressure goes up then the regulator is bad, but if it is low and pinching the hose does. Vortec 383, modified TBI/4L80e. The system was used on 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. 1998 Chevrolet K1500. Ok I have a 1994 GMC 1500 sierra 5. You may want to turn the key on for 2-3 seconds, then turn to start. 6. Hi I have a 1991 chevy Silverado that just started about a week or 2 ago misfiring randomly and cutting out under load. Its pretty important to keep the return fuel line because your carb can only handle 6psi max. A faulty fuel pressure regulator can cause a loss of fuel. I have a 1992 Chevy C1500 4. 2. $65 which is really nothing more than the factory unit with a large adjusting screw! Thus I felt it neccessary to show my TBI bretheren the simplicity of performing this modification. M. If the fuel pressure drops rapidly (to below 10 psi in one minute or less) a leak is present in the fuel supply system. 68 volts when I jumpered the fuel pump relay. ) Clogged injector or lean injector - perform an injector balance test. 3L 5. GM used both fuel pump relays and oil pressure switches. 3L, 5. 0L 5. There is a good chance that your Chevy 350 TBI is bogging due to a lack of fuel. A sooty spark plug could just mean the engine is burning oil at that cylinder. You should see a nice even fan spray of fuel from both injectors as a prime. 7L, Edelbrock MPFI, NV4500, Atlas, D44's, high steer, ARB's, 7" custom semi long-arm 3 or 4-link lift, BFG 33x12. Welcome to our latest video, "6 Symptoms of a Bad Fuel Pressure Regulator"! In this informative and practical guide, we'll walk you through the key signs tha. my fuel pressure is at 18 psi, specs are to be 9-13 psi straight from the manual. #1 · Oct 19, 2012. 95 and back had the old low pressure tbi. 3 V6, teh FPR has no hose, its mounted inside the intakemanifold plenum where the entire FPR is exposed to vacuum. Price: $83. The fuel pressure regulator in the TBI and the fuel pump. Honda Odyssey Motor Mount Symptoms: Don’t Ignore These Warning. Make sure the connections are secure and leak-free. Surging at idle. It has a 4. An incorrect fuel pump (hi pressure vs. When cold the idle fluctuates, i. 5l fuel system the main question is volume. If the vehicle’s fuel pressure regulator fails or has any issues it will disturb the fuel pressure of the vehicle. Injectors are re-manned Fuel pressure regulator is rebuilt Fuel. 213. +. model 220 TBI dumping waaayyy to much fuel & flooding engine. Gasoline in the vacuum hose. Thick Layer on Spark Plugs. As a result, you will get poor mileage. Bad Acceleration An early sign of a bad GM TBI fuel pressure regulator is bad acceleration. fuel pump,fuel pressure regulator,throttle position sensor, checked all. 0L, or 5. Re: New member here looking for some help with 350 TBI running rich. 4L TBI. – Automotive Simple Chevy 350 TBI Fuel Pressure Specs. $157. Fuel Delivery System. 3 Vortec fuel pressure regulator problem, you can start by checking the spark plugs. The big variable is fuel pressure. Those that have played. Fuel. then the distributor. TIP 2: You'll be working around fuel (gasoline), which is extremely flammable. Ships QTY . The fuel pressure regulator springs break. 3. ManufacturerBuy FUEL INJECTION TUNE-UP REBUILD KIT - TBI 295 1990-1994 GMC Truck C50-70 P41 4. If you are using a stock GM TBI, then I believe the fuel pressure regulator is built into the throttle body. 7L and 1987-93 7. Same engine and TBI. There is a backup on the oil pressure switch to power up the fuel pump as long as there is oil pressure. One troubling sign is. i have come to this lovely place so lets get down to it i own a 1992 chevy 350 TBI . Waterbury, CT. . 7 TBI. Leaking Fuel. I have a 1989 gmc sierra with a 350 TBI. Walker Products 255-1025 Fuel Pressure Regulator. line showed the pressure steady, so that meant the pressure. 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. Filter screens get gummed up. Used fuel injectors (from junkyard may not be in working condition) 7. )How to install an adjustable fuel pressure regulator on a GM TBI systemthis gives you the ability to adjust fuel pressure and fix the low pressure the factor. The throttle body system sends fuel at a higher pressure than a carburetor needs, so the two aren't exactly compatible. the pressure should increase a few psi, then return to normal. 3L, 5. P1406 is for the EGR valve. I replaced the fuel. 7L (UNDER 8500 GVW) . Reaction score. 3. 7L throttle body fuel injection (TBI) GM vehicle is due to a lack of fuel, which usually means that the fuel pump has gone bad. 3L Vortec, with 142,000 miles on it. . 183 posts · Joined 2009. . I had two issues that caused a similar effect. 1991 s10 blazer 4x4 4. There is some discussion that some Vortec injectors make be underrated and may flow up to 28#/hr at 60 psi. With a service range of 9 to 13 psi being considered good. 74 Chevy: 350tbi/400/205, 60/14 4. The retainer mounts on top of the fuel pressure regulator cover. As soon as I shut off the engine, the pressure slowly (20-30 seconds) drops back down to zero. 7 TBI conversion 1978 Mustang II King Cobra Road Racer - Holley 650, MSD 6AL, 5 speed, 10 point Roll Cage,. 1990 350 chevy in a itasca motorhome in park rough idle in drive it backfire in. 2.