Question about 1988 GMC S-15

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1988 Sierra Classic GMC S15 4.3L was running, drove around block, rumbled and stopped and will not run again. I checked the fuel , plenty of, it is not firing, changed cap and rotor problem not resolved.

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Check all fuses and relays,check coils.check to see if your rotor is turning under the dist. cap.If not your timing chain came off

Posted on Sep 25, 2009

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Posted on Jan 02, 2017

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1988 gmc 1500 truck acts like running out of gas will quit running then will start back an do same thing again has plenty of gas in tank


look for vacuum leaks anywhere ..check under cap/coil for wear/dirt on ignition parts replace if dirty/blackened or wet..pull a plug and look for blackened tips or carbon bildup..replace plugs if dirty..is the truck carburerated or tbi..clean with stp carb and tbi cleaner..it will remove built up varnish and gunk in/on the throttle plate and jets..also some filters have a backpressure valve in them to prevent vapor lock in older vehicles that had this issue..if you can blow thru it should work ok..if not needs replaced with type that doent have the valve in it.(has arrow that shows flow direction)..good luck repost findings

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I just bought a 1988 Chevy Suburban. I drove it home on Friday with no issue. I then drove it all day today while starting it and stopping it with no issue. I then parked it for a few hours. It now won't...


I would try to get a fuel filter first and replace that if that isnt it you probably have a issue with the fuel pump. also try taking a hammer and bang lightly around were fuel pump is located in the gas tank.If you have a issue with fuel pump and dont no how to drop tank and replace it you would be wise to shop around because it could save you hundreds of dollars.

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Stopped while running. alt bench tests ok,


you need your fuel filter most cars and trucks will only run a short time being bypassed because of the wiring

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Possibly faulty ignition module is the problem, stalls when engine is hot when you sit for a while it cools off and runs again until it heats up again, those are usually the symptoms of a bad ignition module and after a while it may give out all together and not run at all, usually if the module is at fault it shuts down the fuel pump so the engine don't load up with fuel, do to when engine continuously cranks over the injectors never stop squirting fuel and flood the engine do to lack of spark which is produced by the module, this could possibly be your problem.

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