Question about 1992 Chevrolet C1500

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1994 chevrolet 5.7 TBI running like poop

My 1994 chevy C-1500 with a 5.7 litre TBI has a problem. When i try to start it it doesnt fire like it should i need to push down on the gas pedal which is really odd. also it idles sloppy and dies out when i put it in drive or reverse or even just on a idle

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Fuel enrichment? The TBI /ECM system increases fuel mixture when cold starting. If you have low fuel pressure or dirty injectors it will impeed this function. The computer will continuely try to solve but cannot do to the low fuel function, should get it fixed right away as it will burn out the phase of the computer that controls this. Fuel pressure test first, it should hold between 9 -13 lbs of pressure. If you have not changed the fuel filter inline located on the frame do so $10 and it could be the fix. You can hookup a timing light and point at the injectors and this will illuminate the spray making it easier to see, the spray also will run in time with the light so if it is not there is a sequence problem between modulator, computer and possibly a crank/cam position sensor. Good Luck

Posted on Nov 19, 2010

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You probably have a vacuum leak, get a gauge at autozone and see what your vacuum level is at idle and under load it should be 15+ also check fuel pressure, and see if there is a dead miss my removing one spark plug wire or coil at a time to see if it effects the way it runs 

Posted on Apr 30, 2010

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