Quote:
Originally Posted by J. M. van Swaay
A faulty coil may or may not result in a code on the M104. From my experience, a defective coil that causes rough running at idle, and/or miss under acceleration will not result in a stored code.......
J. M. van Swaay
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My wife's 1995 wagon did store a code, which pinpointed the coil pack for me to replace. Worked a charm. Maybe that was an anomaly though -- but there are separate codes for each coil pack.
Cheers,
Gerry