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Posted by abdul (90 GXE 92 SE 5spd) on August 13, 2002 at 17:48:29:
In Reply to: UDP questions.... posted by James on August 13, 2002 at 17:34:42:
Abdul
one is the power valve...vaccuum leaks or non-working power valve can cause RPM dips. The other thing to check is the IAC-AAC valve. Do a full cleaning of the throttle body and clean it of carbon deposits. This controls air by metering it with engine load. Your symptoms sound like them..