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Old 07-12-2002, 10:18 AM
Cap'n Carageous Cap'n Carageous is offline
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Join Date: Aug 2001
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Posts: 3,044
When the car is running (idle) the rpm will suddenly jump and the thottle plate will open more. Then it will slow back down and, of course, the throttle plate comes back up. This may go on for the entire time the car is running, or, if the check engine light comes on it stops this. If it chokes down, as it eventially will, the idle valve strats clicking in no particular rhythm. Sometimes just before the engine dies it will act as if it's gasping for air, with the throttle plate jumping up and down rapidly.
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