2004 545i Random Misfires
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Joined: Dec 2015
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From: Westlake, LA
My Ride: 2004 BMW 545i
2004 545i Random Misfires
Anyone ever have random misfires on a 545i?? they jump around also its rarely the same cylinder... sometimes it does it and sometimes it runs perfect.... has new plugs and new coils...
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Joined: Sep 2012
Posts: 477
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From: Halifax, Nova Scotia, Canada
My Ride: 2004 545i+BT+AUX+Coding
Model Year: 2004
Engine: N62
+1
Have been
Chasing a fix but seems rather common especially in colder weather when starting up, which is my issue.
One possible fix I will do soon that I read about on an E53 forum is to replace my injector 'O' rings as they maybe dryed out in the 12 yrs....
4.8 Misfire Detected Checksum Failure - Xoutpost.com
Have been
Chasing a fix but seems rather common especially in colder weather when starting up, which is my issue.
One possible fix I will do soon that I read about on an E53 forum is to replace my injector 'O' rings as they maybe dryed out in the 12 yrs....
4.8 Misfire Detected Checksum Failure - Xoutpost.com
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Joined: Jun 2012
Posts: 94
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From: Charlotte, NC
My Ride: M5 SMG
Model Year: 2006
Since you changed the coils and plugs, it just might be the stock tune. Mine was funky until I did an Active Autowerkes tune. It really helped, and the car felt faster.
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