My 1992 GMC Sierra will start but will only run for 20 seconds exactly. Change fuel pump, fuel relay, tested computer. Swapped computers. Why does it do this?

Asked by 808gordon Apr 16, 2015 at 02:55 PM

Question type: Maintenance & Repair

My 1992 GMC Sierra will start but will only run for 20 seconds exactly. Change fuel pump, fuel relay, tested computer. Swapped computers, distributer cap.
what could be the problem.

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