So I parted it out. Well, I did, but not for that. Anyway, about the same system with that monovalve and when mine did stop, I made sure the vacuum and electrical connections were good (and clean) and it solved the problem. There is a low cost rebuild kit for the monovalve also. But make sure you are getting electrical power to the thing.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!