1994 Audi 90

1994 Audi 90 6 cyl Front Wheel Drive Automatic 200000 miles

I've been having a problem when I let my car idle the rpm' will drop down very low. Sometimes the rpm's will rise again other times it will die. This happens on and off whenever im parked, but only when my check engine light turns on. I've had my wiring looked at and my 02 sensor replaced. I dont know what else to do.
June 1, 2009.

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