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Old 06-19-2000, 08:33 PM
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Join Date: Jun 2000
Posts: 35
Symptom: When I drive the car between 30-40 MPH (2,000 RPM) and then come to a stop at a light or whatever idling, OR idle the car stationary at around 2,000 RPM, as soon as I completely let off the accelerator and the engine returns to idle the car shakes very noticeably for about 5 seconds and then gradually smooths out. This started about a month ago and the car ('84 300D) has about 120,000mi.

I've replaced both fuel filters and the symptom hasn't gone away. The shaking happens in all gears (I haven't tried reverse at 30-40!) Could this be that the fuel pump is showing signs of failure? Is there some sort of idle adjustment that could be stuck? What would cause shaking and then the problem smoothing out on its own?

Would appreciate help.
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Old 06-19-2000, 11:02 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The first thing I would do is have a tech replace the idle damper. It is on the outside of the pump and is not hard to replace.

Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
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Old 06-21-2000, 12:08 PM
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Join Date: Jun 2000
Posts: 35
Ok, I'll go there first. Thanks for the advice
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