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      10-31-2016, 07:00 PM   #13
bryanssilva
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Drives: BMW 335is
Join Date: Jul 2015
Location: Inland Empire

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Quote:
Originally Posted by DaZuc View Post
I had these exact codes when I did my DP's, and it was because the precat (first set) of O2's were installed backwards.
Except I was only misfiring 3 cylinders and it happened randomly.
I don't quite understand... so what do I need to do? Which one is the precat 02? black or grey wire? I just flashed to stock I will check to see if i still get the codes... Thanks everyone for your input.
Appreciate 0