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up and down idle

1766 Views 6 Replies 5 Participants Last post by  turbodek
has anyone had a problem with the idle going up and down on a k20a?
what should we check for? it idles from 1500 to 3000 rpm.
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Try covering the Throttle body with your hand, if the car still runs, and doesnt shut off immeadiatly, 10 to 1 you have a vaccum leak...
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