@tomkuester posted:My pump is about four years old. About six months ago a realized that the pump was not shutting down after building up the vacuum. I checked for leaks, found nothing, so I checked if a pressure sensor part was available for my pump. It was, so I bought one for about $75 (guess) and that did the trick. It shuts off and stays off when the needed vacuum is achieved.
You bought the replacement pressure sensor from Compcams?
I'm thinking of putting a vacuum gauge in line so I know what the pump and reservoir are doing?
So now you are confident that the booster isn't leaking?