had the engine replacement nowafter 55,000 miles . i now get the code for the varible port motor?(p2004)04 6spd only intake and ms exhaust.all recalls that make my car run worst.could use mid grade before reflash and now only premium only because of the mable can effect. gas mpg sucks even worst.200 best city/highway 50/50 with cruise don't matter if i granny shift or nail it to the wall!!!