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Old 10-04-2009, 02:02 AM   #1050
Rajaie
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Join Date: Nov 2007
Location: Raleigh, NC
Posts: 1,253
My Ride: 528i 06/00
Quote:
Originally Posted by devedean View Post
I pulled the exhaust solenoid and cleaned it but there was no change to the codes or engine performance. It still throws the "VANOS, faulty exhaust reference value", idles rough, and chokes when letting out the clutch at low rpms. I'm at a loss now.....
When did you first get the P1520?
When you replaced the crankcase vent valve, did you also replace the 4 hoses?
Did you inspect the idle control valve air intake boot branch? This gets cracks in the outer elbow accordion valleys.
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