my car idles up and down while its parked and running and when i stop at a red light.the engine runs up and down 2 seconds apart
Apr 18, 2008 at 12:55 PM
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BLACKOP555
✓Experienced Mechanic
10,386 POSTS
sounds like you may have a slight vaccum leak, with vehicle idling spray around the manifold and throttle body, and vaccum lines with carb cleaner, if idle changes you have found a leak.
also clean out the throttle body, and check the PCV valve