Hi,
This is my first post although I've spent many hours scouring every BMW forum going recently.
I've had my 635 Highline a now but it started causing me grief after it had been stood for a week, some months ago. It's an intermittent problem so is proving hard to track down.
It starts ok and will run fine for a couple of miles (although this varies) and then starts to what I can only describe as "over fuelling", and will flood / cut out if left in Drive (it's an auto obviously).
If you drop it into neutral and rev it, it'll cough, splutter, backfire, shoot flames out the back and stuff but will limp on. Eventually, it'll cut out altogether and is impossible to start for a couple of hours.
It's been into the local BM Specialist three times. First, they couldn't find anything and it ran ok for a few weeks, then the problem came back. Second time, they said that Fuel Pressure Regulator wiring was disconnected and they fixed that. Again, it was ok for a bit then started again.
After spending many hours searching forums, I had the FPR and fuel pump relays changed and at the moment it's ok.
Anyone experienced this problem or got any ideas, just in case it returns! Arrgh!
Running Rough
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