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jwasbury jwasbury is offline
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Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,608
I've done this test on my car worries. Just don't push on that plunger. FYI, I also found that I could test my warm CP without running the engine...just leave the WUR unplugged for the CCP test, then plug it in and watch the CP rise. I did the test a 2nd time but ran the engine and found no difference in the WCP running or not...I think that means the heating element in my WUR is good. Definitely make sure that you are referencing the correct chart in the service manual and match up the part number to your WUR. 1st time I checked it, I thought my CCP was out of spec, but then realized I was looking at specs for a later WUR, not the one in my '79. System pressure cannot be tested with the engine running IIRC, at least not with the gauge hooked up on the fuel line between the WUR and the center of the fuel head.
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 03-03-2009, 05:05 PM
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