Question about 1994 GMC Sierra
Ran rough. then had to pump the gas pedal to keep it running, then all of a sudden ran great. then wouldn't start. then would start but had to pump the pedal to keep it running again. then ran somewhat til i put it into gear when put into gear it dies. now it wont start at all. help
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Posted on Jan 02, 2017
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
sounds like fuel pump pressure. I had the same thing happen to me in a Lincoln mark VII and the electrical connection was shorting out in the fuel pump. I changed the fuel pump..Returned under warranty) put the new one on with filter and had no problem with it.
Posted on Oct 10, 2008
your egr valve might be faulty bring it in to the auto parts to have it check out what your looking for is the 32 code on the OBD II scanner.
Posted on Sep 04, 2009
The fuel pump should be in the 20s. Also it could be losing presure slowly. Leave the fuel pump pressure gage on for at least 2 to 3 hours to see if it is losing pressure - It's a start
Posted on Oct 14, 2009
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