My new beater passed inspection today after 1 bolt on the exhaust flange against the CAT was replaced because of a "leak". I picked it up and shortly after the CEL came on. I took it back to the garage and they ran diagnostics. It ran 4 evap codes, so we cleared it thinkin it might have something to do with the exhaust leak. It came on again on my way to get fuel. I noticed my fuel cap hissing as I unscrewed it from the neck. Anyone think the infamous charcoal canister needs to be replaced?