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2010 2011 BMW 5 Series Forum F10 550i misfire under hard acceleration. |
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05-17-2017, 11:10 PM | #1 |
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550i misfire under hard acceleration.
So my 2011 550i has has started to misfire under acceleration. If i drive like a grandma everything is fine but when i down shift to pass someone i get a drivetrain malfunction. Now the bmw dealer i got the car from replaced all 8 injectors and all plugs and coils before i bought it 400 miles ago so what gives.
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05-18-2017, 08:06 AM | #2 | |
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Quote:
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05-18-2017, 08:56 AM | #4 |
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05-18-2017, 10:34 AM | #6 |
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I had same issue only misfire on CY 8 like you said if I drive slow its fine as soon as I step on it over 2 RPM its throws out drive train malfunction.
Frist two times I took it to dealer they told me they couldn't replicate issue. just other day I was coming back from store I step on it and there it goes Drive Train Malfunction. I was furious took it in show the manager as car was shaking like Hell I told them to keep car for month if they have to @ that point I dint give a S#it. Next day they called me SA told me they replaced coil 8 and spark plug its been good. I hope it doesn't come back. Good luck
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05-18-2017, 11:19 AM | #7 |
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A bad coil will take out a good coil and a bad coil will take out a good plug. They "should" normally be replaced together if one has failed.
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05-19-2017, 10:34 AM | #11 |
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be careful even if you install new plugs and coils you still can have defected coil or plug.
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05-21-2017, 12:44 AM | #13 |
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Codes are the first step to healing. You can't replace random parts and hope all goes well.
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