Sounds like a bad check valve in the vacuum line to the booster or a bad booster. Hopefully the check valve not the booster since they are much easier to fix. Dave 77 Rabbit 16v -- To unsubscribe, send "unsubscribe scirocco-l" to majordomo@scirocco.org. If you experience other problems, email: scirocco-l-probs@scirocco.org