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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 12-24-2010, 05:11 PM
zsazsa zsazsa is offline
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Location: arizona
 
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Mein Auto: Z4
missfire according to the computer

Gentlemen,

I just bought a Z4, 31kmiles, excellent condition. It failed OBC2 test, #6 spark plug missfires. I drove the car, drives like a charm, looked at the spark plug, looks good, measured the coil, looks good. I do not belive that this problem is real. I reset the computer, drove a few miles, no problem yet. What else shall I do? Many thanks Zsazsa
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  #2  
Old 12-24-2010, 06:02 PM
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wildag wildag is offline
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Mein Auto: '06 Z4 M Roadster
Reset the ecu code and see if it happens again. If it does, start with the plug and then the coil.
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  #3  
Old 12-25-2010, 12:46 AM
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imz4n imz4n is offline
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Mein Auto: 06 3.0 si Z4R
Or switch plug and/or coil for a different cylinder
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Old 12-25-2010, 06:43 AM
khammack khammack is online now
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Mein Auto: 2002 M Roadster/2014 435i
Could also be an indicator that the Mass Airflow Sensor needs to be cleaned.
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  #5  
Old 01-07-2011, 11:53 AM
Bill_R Bill_R is offline
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Location: Manitoba, Canada
 
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Mein Auto: 2003 Z4 3.0
At 31K you must be just about due for an Inpection II service, which includes replacing the spark plugs.

At 40K miles I was getting missfires on my '03 3.0 after the car sat for a week or more. I replaced all of the plugs - easy to do - and it has been fine since.

It's likely no more than that.

Last edited by Bill_R; 01-07-2011 at 12:03 PM.
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Old 01-07-2011, 06:45 PM
zsazsa zsazsa is offline
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I exchanged #1 and #6 coils, reset the OBD2, it is okay ever since.... Many thanks
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  #7  
Old 01-08-2011, 07:14 AM
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imz4n imz4n is offline
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Quote:
Originally Posted by zsazsa View Post
I exchanged #1 and #6 coils, reset the OBD2, it is okay ever since.... Many thanks
I wish more threads worked like this one did. Help guys, I have an issue, thanks for the thoughts , here is what I did, result. Priceless !!!!!!
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