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jwasbury jwasbury is offline
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Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,612
Originally Posted by jpilcher View Post
I would like to second the check for air leaks. I had a very similar issue when I purchased my car last year, WUR vacuum line was disconnected. Fixed my idle once reconnected.
The WUR vacuum line is actually the boost "signal" for the WUR. So, if its left disconneted, it can create a vacuum leak and the unmetered air entering the engine can cause bad idle. But more importantly, if not connected the WUR will not have a boost "Signal" and will not lower control pressure when the turbo generates positive maniford pressure (a/k/a boost) - thus you have no boost fuel enrichment, A/F ratio goes lean on boost, and eventually engine goes boom!

good catch!
Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690
Past: 2009 997 Turbo Cab / 1979 930
Old 06-06-2013, 09:08 AM
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