u/Fabulous-Web-4959

On my E46 with the M54B25 engine, when I press the accelerator the RPM drops, and when I press it more, the revs fluctuate up and down quite a bit. At around 2500 RPM it stops doing it.

Diagnostics showed misfires on 4 cylinders. I’ve already ordered new ignition coils, but I’d like to ask in advance what else it could be. The pre-cat oxygen (lambda) sensor is also bad and I’ve ordered a new one, but I’m still wondering what else could cause it. Could it be the DISA valve? Wouldn’t that only cause issues at idle?