There was one thing left that I hadn’t tested for in my quest to sort the idle issue, and that was the fuel pressure.
Another part of trying to sort the idle is to replace the idle control valve, which has been a bit suspect from the beginning.
In my quest to smooth out my idle issue, I wanted to remove and check the DME and VNC units.
Ah yes, that time again. It’s not my M3 if it doesn’t involve rebuilding the Vanos at some point.
Well this is a familiar job, the old brake light switch failure.
Ugh, What a terrible place to hide a starter motor. I had to do it though, mine was getting worse and worse.
Progress on the BMW is slow. Unfortunately I fix one thing, and in the process find something else that is broken and needs more parts ordered.
Yet another issue that was discovered on the car was that there were signs of oil leaking from the bottom of the vanos solenoid cover. This is a clear indicator that the solenoid seals are beyond their useful life.
Parts are arriving almost constantly, so it was time to start cracking on fixing my BMW.