Bruce,
Guess I can feel better. I took the check valve off and inspected it thourghly. It looks ok, and I can blow through it one way but not at all in the other direction. I checked the whole dam unit with mirrors and flashlight and can't find a number, word, or letter on it. I think your statement of maybe a leaking diaphram may be the problem but wouldn't it have gotten really bad over the years until I had no brakes or am I reasoning off in the wrong direction. Also checked the connections to all vacuum ports and everything is good. Removing that unit, even if I could find another that wouold fit in there is about a two day job. Do you know where I could look to find any numbers or codes that would tell me what it is from?
Thanks,
Ron
