evap Canister Seems to be ok, I'll check the house with in line valve, pcv valve hose is on tight. I'll probably replace all the vacuum hose i can to eliminate any issues. I do have a new gas cap, not oem, no whoosh sound, no shut off problems when refueling. Gas filter tube is rusted and probably needs replacement. I definitely think there's something with the evap canister or in line valve. When you're outside the car you can smell/taste exhaust. I also have brake booster issue,could this tie into evap problem, tested booster, not airtight.