Question about 2003 BMW 325
Car random misfire on a petrol car,parts fitted ht coils,spark plugs.
I don't think your trouble is on the ignition side of it but I am sure that you must have a look at the idle speed control(stepper motor).
If with temperatuer your "misfire"changes to better, it means that it's probably running too lean at cold, normally the stepper motor or ISC does this job.
Let us know how you get on.
Posted on Oct 31, 2008
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Posted on Jan 02, 2017
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