Alright, now we are getting somewhere. As for the FPR cover, search the site for fuel pressure regulator, you will see a great write up on replacement. I bought an allen key set and ground one down to fit that rear screw. After I was done, I opted to not install that rear screw. That was back in Mar before Moab, no problems to date. I am gonna take a look at my VSV out of curiosity. But ultimately, P0440 means nothing to me, just an emissions related thing, the truck runs great, no problems....knock on wood.... I am not sure what a smog test would do for you? I don't even know what that canister in the front does!!! Time to do some research when i get home from work.