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2000 gmc 4.3 cutting out

I recently purchased a used 2000 GMC Sierra 1500 pickup truck with the

4.3L engine. Several times while driving, the engine hesitated for a second or two and would then run ok, but on one occasion while on the freeway, it cut out completely as if someone turned off the ignition, After coasting to the side of the road, the engine would crank, but not run. After sitting about fifteen minutes, it started up and ran ok. It accelerated fine with no hesitation. Today, while driving in the city, it cut out and I had to restart it while coasting down the street. It then ran ok all the way home a few miles away. Any thoughts/suggestions on this one?? I acts like it is ignition related and not a fuel / fuel pump problem. Thanks , Dave
Reply to
greenmachine
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Have you pulled codes from the computer?

Reply to
Woody

check fuel pressure. but a big problem gm has had on the new 4.3 liters is the dist cap and there was actually a recall on it. if you pull the distributor cap it will probably have lots of corrosion under it.

Reply to
gmtech

I did change the cap and rotor and it seemed to help a little, but unfortunately the other night the engine quit completely and I had to have it towed. I believe it may be a fuel issue. If I spray starting fluid in the intake pipe, the engine will start and run for a few seconds. Tomorrow, I'll see if the fuel pump is working. Thanks for the replies.

Reply to
greenmachine

it might be a relay problem or some other thing. does it have a distributor or seperate electronic ignition.

If you are sure you have a fule problem, it means bac ECU or some sensors. you can bypass the problem by shorting fuel pump relay.

carry a thick cooper wire with you. It it does it again, try to short the fuel pump relay. i bet it will run immediately. drive where ever you wanna go and pull the wire out or the socket to stop and then, turn the ignition off. Be use to use a relatively thick cooper wire. It will keep you on the roads.

good luck.

greenmach> > Woody wrote:

Reply to
uccoskun

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