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Old 04-07-2001, 02:17 PM
David Mixon
Posts: n/a
The Motor will surge in RPM at idle when in park or drive. It is more noticeable when the car is first started, but it continues after it is at operating temperature.

The timing chain was replaced 10,000 miles ago. The car has approximately 80,000 miles on the motor with no other problems.
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Old 04-07-2001, 03:16 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
I would suspect a problem with the idle control system. The system resets itself if it can't achieve desired idle speed. Look for vacuum leaks and be sure the throttle is fully closing. If there are reasons for a high idle the valve will be commanded closed. It may actually control the speed at times, but at others it won't and when the system resets the speed surges.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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