Alright guys, I'm a bit puzzled by this one. My dad has a 2005 mustang
gt vert and the check engine
light keeps coming on for a p0456 small evap leak. We have replaced the gas cap and the fuel pump, but neither has fixed the problem. Ford dealers nor my mechanic friend have any other clue what the problem might be. Do you guys have any suggestions to find/fix the problem. Thanks guys.