Question about 1986 GMC S-15

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My 1986 gmc s15 will not stay started unless you keep shooting starting fluid in it. i have checked all fuses, changed the fuel pump and fuel filter.

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Sounds like it only runs on starter fluid.sort of. Mine is an 84 with a carb. You may have a bad fuel injector or dirty at best. Have your checked for good spark or dist rotor pointing to #1 in dist cap at TDC. The timing chain may have worn and jumped a couple of teeth

Posted on Sep 26, 2009

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My 98 gmc safari starts but won't stay started unless u keep putting gas into the throtal thing behind the airvent I already changed the fuel filter still doing the same thing help


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Better have the fuel pressure checked for starters. Even though the pump comes on, your fuel pressure might be too low. Lots of GM vehicles are finicky about proper fuel pressure, especially at start up. It could be a weak pump or failed fuel pressure regulator-a pressure test will sort it all out.

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1 Answer

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1 Answer

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1 Answer

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What year and model is the truck?.. You say that if you use starting fluid and keep the gas pedal on open throttle the truck stays on?.. that means that at certain point you do get gas in the fuel system. Is it correct?.. otherwise let me know so I can give you more instructions.

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