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well all i put that new fuel pump and scrrener in and a fuel filter 2 weeks ago, went and filled up today at Swifty gas and now truck runs like ****. if you jar down on it it spits spuuters shuts off hesistates, ic hanged filter again and still doing it. i hope its jsut bad gas but the truck run like complete ****. tomm im gonna change plugs, change oil and ****. what could htis be just bad gas that needs gone or plugs or what?
Hey Man. I have some bad news for you. I had the same problem about a month ago. My fuel pump went out, left me stranded 40 miles from home, I had the fuel pump replaced and everything was fine until I filled up again. I did not even make it home b4 it started acting up. Like you I thought I had bad gas so I dumped in some HEET to take care of the problem, only it did not help so changed the fuel filter. I started the truck everything seemed fine until I got in it to go to work, about half way there it started again!!! I took it back to the shop. I only had 30 psi fuel pressure and when you reved it up the presure went down. The new fuel pump had failed. B4 you do too much more to the truck, check the fuel pressure I think you will find it low.
A common mistake made when installing a new pump in an OBS truck is the line connecting the pump to the fuel tank module. You MUST use a high pressure rated fuel hose rated at over 80PSI burst pressure otherwise it may split. I also put two hose clamps on each end of the hose to keep it from slipping off under pressure.
whats the pressure its spose to be at idle and at throttle? ill put a pressure gauge on it and see where im at, if the pressures are ok then i guess its plugs or the fuel?
I used 300 psi fuel hose so that it would never break apart or anything
my buddy had the same kind of problem and it turned out to be the plugs so if you find that its not the fuel lines or pump its probably the plugs, but also it wont hurt to throw some heet in the tank.
it threw a tranny solenoid code and alos the fuel pressure is 40-44# idling and at throttle. still spitting and sputtering like crazy. any suggestions.
Wait a minute, you still have the 96 model 5.7L vortec? Horse of another color. That ones supposed to probably run 43 PSI. Not sure. Backfire/sputter would probably mean time for a distributor cap and rotor.
yeah my 4.3 had a corroded distributor cab and it really made the truck sputter especially when it rained.. it was bad. once i replaced it the truck ran great. you wil be able to tell as soon as you take it off itll have that nasty green battery acid corrsion look to it.
ad gas could that cause that kind of thing?