wont idle

Asked by May 28, 2016 at 09:55 PM about the 1994 GMC Sierra 1500 C1500 SLE Standard Cab LB

Question type: Maintenance & Repair

94gmc Sierra 4.3 dies at idle changed fuel
pump cap rotor has good spark have to put a
cap of gas in tbi to start but if not reving will
die runs fine when driving just start up and
idle

1 Answer

775

Have you checked the idle air control valve?? They are notoriously bad. If your idle air control valve checks out (meaning, it's good), then it could likely be EGR valve. However based on what you're describing, it is not likely that EGR is your problem.

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