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DBabbitt DBabbitt is offline
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Join Date: Sep 2017
Posts: 21
Thanks to and this web site, I found the problem with my CIS pressures. This AM with it below freezing I took new pressure readings with the test valve open and closed and in all instances read 72 psig. I surmise the warm up regulator (control pressure regulator) is stuck closed so that for the first 1/2 mile of driving, the car always ran lean and "stumbled" under any load.

I've ordered a replacement and between it and the old should have the car running as it should. I was putting too much rocket science into the situation as current pressure readings should have led me to a resolve sooner.
Old 12-12-2017, 06:55 PM
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