Hi everyone, as with everyone posting I need advice. I cannot get the car through NJ inspection. Po455 is the code coming up. I took it to a mechanic he ran a leak test and it was fine. He saw that the purge valve was stuck open and I replaced it (was not that expensive) ran it for about 40 miles and the check engine light went on again. Any sugesstions and where should I check next. Any common problems? Dennis