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Old 11-01-2002, 12:23 PM
suginami suginami is offline
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,508
My engine developed the same problem a while ago.

My mechanic replaced the mass air sensor, and it didn't fix the problem.

My mechanic then replaced the throttle actuator (you car doesn't have a throttle actuator. You have an idle control valve). It didn't fix the problem

The mechanic gave up and told me to take it to the dealer.

They immediately diagnosed the problem as a leak at the intake manifold gasket. $400 later, the car was fixed.

Needless to say, I now have a new mechanic.
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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