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What next!?? Missfire problem persists
Hi guys, I’ve got a 325i n53 2008 e93, I’m getting a missfire on cold starts mainly from cylinder 5 , I’ve changed the coil , plug , and injector as inpa was showing it was going into red, after changing it’s in green and car runs better, no lumpy idle , pulls well, never fails to start, just on cold mornings it missfires , after turning the engine on and off it doesn’t do it again, I kept getting codes for pre-car sensor bank 2, so changed that now car is running a lot better, but still get the missfire when cold, only codes I’m getting now is the missfire when present on a morning, and a running rich code, not for any bank just a running rich fault code, I’ve cleaned the maf etc , is my problem the running rich ? Possibly the injector I bought second hand faulty? Could it be electrical? Any help really appreciated. Thanks jack
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