Idleing to high

Asked by Apr 09, 2019 at 01:53 PM about the 1993 Buick Roadmaster Limited Sedan RWD

Question type: Maintenance & Repair

1 Answer

8,440

How long since a tune-up? Any applicable trouble codes? Make sure throttle valve closes all the way. With high idle, block off the mouth of throttle body, it should kill the engine. If very little or no effect, you got false air getting in there from somewhere.

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