I had a valve cover gasket repair on my 2006 X3.
and the shop left the ground wire to ignition coils 4, 5 and 6 loose.
Car had a bad miss and after rehooking the ground, cylinder 4 still not firing.
Replaced plugs, tested for bad coil, tested for short to ground, bad wire etc.
Computer scan by Bmw tech indicates DME (computer) is damaged. Is it likely a bad ground connection can short out the computer?
I would say it's definitely possible. If they were the ones that left the wire loose, then they should be on the hook for the repair.
ASE and BMW Master Certified Technician
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