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O2 sensor is unplugged. It's been that way as long as I've had the car (PO did it). Simple enough to plug it back together, but then the car harmonically surges on steady throttle (cycling of the lambda system?) so I've left it that way (disconnected).
I've never noticed much of an rpm drop when removing the oil filter cap with the engine running, so there may be some element of a baseline CIS vacuum leak.
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1987 Venetian Blue (looks like grey) 930 Coupe
1990 Black 964 C2 Targa
Last edited by Noah930; 02-03-2013 at 08:54 AM..
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