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Old 08-19-2008, 11:27 AM
richard stewart 3rd's Avatar
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egr valve

If the egr valve is stick open it will cause,
rough idling, a vacuum leak, & hesitation.
if stuck closed it can cause knocking (pinging)
Rich

Last edited by richard stewart 3rd; 08-19-2008 at 11:29 AM. Reason: spelling
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