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I think I’ve got the same thing going on - started a thread here too. I had my rod bearings replaced back in Jan. A couple weeks after I got misfires on cylinder 2 so had the coil replaced and throttle actuators done as well since this had been an ongoing issue.
Car ran fine for several months then just a few weeks ago got CEL while on the freeway. Light went out on it’s own but then got misfires and codes a week later. Misfires on all remaining 7 cylinders. It was odd they all went at the same time and #2 was good... led me to believe it was just time to replace them so had that done. Unfortunately this didn’t fix he issue and I stalled a day later. Took the car to BMW this time and they said hey found a loose ground wire under one of the coils and thought the dme was compromised as a result. We replaced it (even though I doubted them) and it didn’t work so now I have them fixing their misdiagnosis.
At this point I’ve had rod bearings, both actuators, all 8 coils and plugs, and the dme replaced. No luck. In my thread someone responded they’ve seen issues like this coming from a faulty fuel valve under the manifold or bad ICV... more likely the valve. I’ve mentioned this to BMW but they haven’t pinpointed that yet. Someone else responded they’ve had issues like this in the past resulting from a loose connection on a wire harness. I’m leaning towards this being an electrical issue but haven’t solved it. I’ve been without a car for several weeks and the BMW techs (master techs too) are puzzled.
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