Quote:
Originally Posted by Samuel M. Ross
So by all means test yours as Brian has indicated which I thinks is with the engine running at idle. And I'll do my best to refresh my memory here today at my Indy friend's shop by also testing my 1980 240D's VCV using a vacuum pump and the engine off and without taking the VCV off the IP.
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The test is done with the Mityvac without the engine running. The Mityvac provides the vacuum to the VCV.