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Hello my sisters cavalier just failed emissions with high HC not to bad i can fix this. Now the other thing it failed was the pressure test!? I called the emissions tech. and he told me it's failing to hold pressure from the tank to the evap canister. I looked for it on ALLDATA but I can't find it.

Anybody have any ideas? where do i begin? Common failures that cause this? and does it go hand in hand with failing the HC test?

Any help will be greatly appreciated. Thanks!