Quote:
Originally Posted by akamal92
I had the same issue ended up being an exhaust gasket not sealed properly giving a miss fire going into limp mode. I changed coils and plugs all OEM still had the issue $2k later. I found the exhaust leak at the header and test pipe giving the wrong A/F reading compared to the other bank setting off a miss fire. Check for that a $20 donut gasket fixed my issue
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Did you have a misfires accumulating on only one cylinder with the exhaust leak? I would think that you would have misfire codes for all the cylinders upstream of that gasket in that scenario (e.g. 1-4 or 5-8 or both if both gaskets were faulty).
I only have a misfire on cylinder 7. The misfire follows the coil, which is the EXACT criteria spelled out in the BMW factory manual with regards to misfire diagnosis.