I don't own a vacuum gauge, but I do have a finger. When I was running all the other tests on it, I disconnected the output line and put my index finger over it. This was a risky procedure since the engine was at operating temperature. The vacuum was definitely there. As I revved the engine, the vacuum never changed. It was constant. That was what I figured was causing the over advance at idle. I'm thinking there's a broken electrical connecting inside the solenoid which prevents it from being energized. > Message: 13 > From: "DMC Joe" <dmcjoe@xxxx> > Subject: Vacuum Solenoid Test > Travis, > Here is an easy test to determine if the solenoid valve is > functionally properly. Place a vacuum gauge on the output line of the > solenoid valve