Runs rough
#1
Runs rough
A few months ago I purchased a 1993 300 E and it ran rough when the engine was cold but good after completely warming up. The prior owner told me the wiring harness was bad. Now it usually runs good when it's cold and rough on acceleration when it's warmed up. Seems to me that the wiring would either be bad or not - but not sometimes this and sometimes that. Would this be more likely to be the ECM?
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