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Old 02-14-2001, 03:41 AM
Lim Lim is offline
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Join Date: Jun 2000
Location: Malaysia
Posts: 55

A friend of mine has a 1993 E200, equipped with Siemen's ECU. When he turns on the air-conditioner, his car will be idling at about 900 rpm. When he turns off the air-conditioner, then the idling will be at approx 1,500 rpm.

Anyone know what's wrong with his car, and how to diagnose the problem.

Any assistance is appreciated.


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Old 02-14-2001, 06:58 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
It sounds as if the idle system is in limp mode. You will have to test the idle control circuit and related components.
Donnie Drummonds
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