I had a bit of trouble finding out which wire on the manifold map sensor to tap for the 2015+ focus st. when installing aux fuel, the map sensor is the reference for the controller to know how much boost you're under so it can control injector pulse width. all the instructions I found were pre face lift instructions which apparently came with a different color harness scheme for the map sensor. so here's a video discussing mostly what color wire on your map to tap into shopping with a few other snippets of info.
