Quote:
Originally Posted by dgroebl  Finally a senior BMW tech gave me a very good tip. With the car running (attempting to idle) remove the oil cap. If you notice allot of suction when removing it, or a change in the idle then, the PCV valve is stuck open. This creates an elusive vacuum leak. Sure enough that was my problem!  |
Awesome Tip!!!!
I had a rough idle & threw lots of codes P1174, all the misfire codes, cam position sensor, TPS and a few more for good measure. Checked all the rubber lines to find the crankcase vent hose going to the PCV valve disinigrated. Replaced it and the vacuum in the crankcase was so high it sounded like turbos spooling. Read your post & all is well again. $58 w/ CCA discount for a PCV valve, 2 cookies & a capuchino.
Thanks a bunch!