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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 05-16-2012, 03:24 PM
i2dm2dc i2dm2dc is offline
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Location: los angeles
 
Join Date: Jul 2010
Posts: 114
Mein Auto: E39 540i
540i. misfire..

I have been having troubleshooting this.. The codes I would get is misfire cylinder 7.. I changed the fuel injector and spark plugs, it started running fine after 40 miles i started getting the same problem got the codes up and it still says misfire cylinder 7.. Can it be the coils? should I check it? if so how can I check if it is bad.. Thank you for READING everyone.. please help.
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  #2  
Old 05-16-2012, 06:02 PM
Mike Gardner Mike Gardner is offline
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Mein Auto: '01 X5 3.0 '00 323CI 540i
Simple test. Swap one ingition coil for another and then run the car. If it's the ignition coil (which it sound like it is) you will start getting an error code for the other cylinder. I keep a couple of ignition coils because I have 3 different bimmers and they always seem to need one.
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