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      10-11-2021, 07:09 PM   #1
F30emir
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Can anyone help me with my M3?

Hello everyone i have a 2013 BMW M3,

So my car started misfiring not too long ago and i took i to a shop they 'diagnosed' it and they replaced my fuel pump, coils, plugs and injectors they said they were bad but however the car is still misfiring and the code that shows up on the code reader it says 'random misfire'

Would anyone know what this might be?
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      10-11-2021, 08:09 PM   #2
Redd
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Which cylinder is misfiring?
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      10-11-2021, 09:13 PM   #3
F30emir
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Quote:
Originally Posted by Redd View Post
Which cylinder is misfiring?
shows random misfire code
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      10-11-2021, 09:53 PM   #4
Datka
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Are you sure they replaced all those parts? Ouch, that's expensive.
Even if they did and you have the same problem most likely parts they replaced were ok.
Find a shop that specializes in BMWs and ask them to check TAs, cats, O2 sensors and idle control valve.
I went through this problem recently and it was one of the upstream 02s in my case.
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Last edited by Datka; 10-11-2021 at 10:11 PM..
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      10-11-2021, 11:02 PM   #5
Redd
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Quote:
Originally Posted by F30emir View Post
shows random misfire code
Is it random on all 8 cylinders? Random on 1 cylinder? Random on 1 bank? All have different potential causes. A simple OBD2 dongle and reader app will tell u exactly which cylinder is impacted.
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      10-12-2021, 07:31 AM   #6
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OP why would you go about spamming the forums with 4 identical posts in 4 different sub-groups? One should be all you need....
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