high idle

Asked by James Jul 02, 2018 at 09:37 PM about the 2003 Chevrolet Silverado 1500 LB RWD

Question type: Maintenance & Repair

what would cause engine to run at 3000 rpms when started

1 Answer
295

Gallon77 answered 6 years ago

This will happen if there's a vacuum leak under the hood. If any lines around t in e engine are disconnected, you may hear a sucking noise and the engine will idle high.

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