I’ve got a 2014 mustang gt premium performance pack 6 spd, it’s got bbk headers, x pipe, magnaflow axlebacks, and boss 302 manifold but one of the plugs is dangling , the car has no check engine light whatsoever but whenever I hook up the scanner to see if it’ll pass emission it comes up with fue and evap , what could be the issue ?

 

Has the center display complained about the gas filler?

 

Yeah, so if there's an original harness plug that's not plugged it, you might want to plug it in. It's probably exactly the problem.

Otherwise, as you state, the fuel/evap is the problem... is not the scanner telling you the exact codes? Those codes will tell you where to go look next. I'd be looking up those codes. Maybe post them here?

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