cylinder 4 misfiring
check engine light comes on after cold start in the mornings, runs like a tractor...check the code..."cylinder 4 misfiring", anyways thought it might be the #4 ignition coil, checked them all and no issues with the coils. Then it's an injector or a spark plug, bought some bmw fuel system cleaner, poured it in and voila the misfire code is gone, and no more running like a tractor after cold start...we'll see how long this lasts for!
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