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Unread 08-23-2010, 03:31 AM   #7
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Name: scooter
Title: Administrator
Status: Offline
Join Date: May 2005
Location: US of A
Rate My Car: 296 / 340
Your Ride: 99m3
Originally Posted by Clarksonvalley View Post

Take a look at my first posting '1995 540i Fouled Plug' dated 8-5-2010.

I've changed all (8) plugs and the #8 (the fouled plug) cylinder ignition coil and still have the 'no-fire on #8' problem. My next step is to put an ohm meter on the wire from the DME to the #8 ignition coil. After that, I'll try to get the DME checked. I'm now about 100% certain the problem is an electrical one - compression is good, leakdown is good, the problem is on the 5-6-7-8 cylinder head as the drivers side O2 sensor is 'faulting'. Have also replaced this O2 sensor. #8 is not firing.

understood and agreed for the most part.
your compression numbers vary by 10% from high to low that is usually not ideal, plug ecu or otherwise.
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