my 1987 Sierra with throttle body is ideling super fast can anyone tell me whats going on ?

40

Asked by Jun 19, 2014 at 01:10 PM about the 1988 GMC Sierra 1500

Question type: Maintenance & Repair

2 Answers

60,095

Check for vacume leaks.

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40

it was the idle air control isprayed it with WD40 and blew it out put it back in and its running smooth thanx for answers greatly appreciated

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