Hi , I have a 2008 Santa Fe limited v6 engine and I had trouble code for a stuck valve in the evap. I don't remember the code but replaced the valve at charcoal canister. Same code came back so I replaced the purge valve and now I get a po455 code. I hooked up smoke machine to line leaving purge valve and smoke came out from vent by filler neck??. When I start engine the old purge valve lets vacume come through but the new one does not seem to. I have tried 2 new purge valves. any advise or help would be greatly appreciated.