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Just bought my first BMW, 320i e91. I've just had all my coils and plugs changed and still get code P0301 (cylinder 1 misfire) showing. Also i'm getting code P013E (O2 sensor rich to lean). On start up and regular driving its fine but as soon as i need to give it some beans to join a motorway or overtake it just misfires and looses quite a few BHP's and runs rough for about 5 minutes. CEL light comes on flashing at me but this all lasts for about 5 minutes while driving and eventually clears itself, mystery!
Stealers quoted me £150 to just look at it, i'm sure it can be FIXED for that, just need to find out what the issue is, any ideas?
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