4.3 cpi fuel system had new fuel lines installed ran good for 2-3 weeks and started hesitating and then soon it would crank and run but would go dead soon as u put it in gear, a mechanic installed a fuel pump and a new spider fuel injector system and things actually got worse now it cranks and runs about 1 out 6 trys and most of the time it goes dead and other times it might run for awhile but always goes dead when u put it in gear
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SOURCE: hard starting after sitting awhile
I posted the second problem, I did get my car fixed. the problem was a weak fuel pump
SOURCE: 1994 GMC Jimmy hard to start and runs rough when first started
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.
SOURCE: 1994 GMC Jimmy hard to start and runs rough when first started
i think if you checked the sparking plugs and map sensors then check your distributer its maybe not delivering the current nedded to perform the spark to some of the cylinders
SOURCE: 1987 gmc jimmy wont start
yea you have no fuel and sound like a bad harness and the gm's are know for there fuel pump harness's! did you change it when you changed the pump? there is a lose connection somewhere in the fuel delivery system and it's pretty simply! i would check the fuel pump relay on the left hand side of the engine compartment and maybe even put power to the pump at the relay position "b" on the fuel pump relay harness and there should be a one pin connector to put power to also connected to the same position on the relay "b" the wire should be tan and white! good luck
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