Join Date: Dec 2005
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There has to be a valve or kinked pipe in the breather system somewhere as you can cure it for a while after blowing the system through.
It could also be the valve on the carbon canister under one of the front inner wings is playing up.I'd be tempted to have this checked next.
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo