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Old 03-25-2003, 01:08 AM
Mark Karlsson
Posts: n/a
Question E420 idling too fast

Hello: I just replaced the throttle valve assembly on a '94 E420. The reason I replaced it is I had a check engine light that came on. I cleared the code and I would get an idle speed control code which would recur after about three days. After replacing the throttle valve assembly, the car would idle at 1500 RPM. I removed the new throttle valve assembly, checked for misplaced hoses and gaskets, found none so I reinstalled the original throttle valve assembly. At this point the car idled normally. I suspect a defective part.

Does anyone have any thoughts on this? Do I have a bad brand new throttle valve assembly??

Any help is greatly appreciated!

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Old 03-25-2003, 07:34 AM
it leaks, its german
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
you've got to readapt the throttle stops, find a shop with a HHT capable of doing this.

Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.
Raleigh NC
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