Question about 1995 GMC Sierra
May run good for a few day or could be 15 minutes each time sometime runs sluggish up hills new fuel filter on it
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
Posted on Jan 20, 2013
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Posted on Jan 02, 2017
the fuel pump could actually be malfunctioning. and the reason that you are able to restart and drive again is because when you turn the key on it is allowing the fuel pump to pressureize your system. but while the fuel pump is continuasly running it is loosing the fuel pressure. this is common on the cheap fuel pumps. i am not sure about were you got the fuel pump from but in all of my experiances with this problem i find that the fuel pumps have been boughten at a napa store.
i hope this helps you out.
and you could attach a fuel pressure gauge on to the fuel rail and start the car and watch the pressure to see if it is droping.
Posted on May 22, 2009
did you do a fuel pressure test? if you havent do it its cheep an at least you can elimanate that. if thats not an issue, then there is only two other things crank sensor, and if there is one cam sensor.
Posted on Feb 02, 2009
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