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Classic Bimmers
Discussions pertaining to vintage and classic BMW models here...

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  #1  
Old 11-01-2012, 08:32 PM
Takedown Takedown is offline
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Location: Oshkosh, WI
 
Join Date: Nov 2012
Posts: 1
Mein Auto: 1994 740iL
94 740il missfiring?

Just picked up a clean 1994 740il with a missfire. I know it was a complete gamble seeing as how it could be something serious but I went for it anyways. I havent dug into the problem yet but what I was wondering was does the m60b40 have any known common problems that are notorious for failing like coil packs etc? Im going to hopefully figure out the issue this weekend.
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  #2  
Old 11-15-2012, 01:04 AM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 2,253
Mein Auto: E23;E30;E38;E32;E34 +
Coll packs give out without warning. Easy fix though. Try to borrow one if you can and swap it about. Take the injectors for a rig clean, flow and pattern test. New plugs all round. If that doesn't fix it come back for more 'gems' from us.
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  #3  
Old 11-21-2012, 06:19 AM
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PETER NEWMAN PETER NEWMAN is offline
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Location: RAINHAM KENT UK
 
Join Date: Mar 2010
Posts: 270
Mein Auto: BMW 635 CSi BMW 730i E38
Smile mis firing

I would remove each coil and check that there isn't any oil laying in the spark plug recesses as these tend to fill up with oil which leaks past the cam cover gaskets, Please check this before you start replacing any parts.
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