2013 XCT Engine when first started idles OK. A few minutes of running and the idle will sometimes drop off and actually stall out. It has done this a few times at stop lights. Also while running down the road at between 2200 and 2700 rpm it feels as though it has a surge. I just replaced the IAC motor and have yet to test ride it. But intial start up after resetting procedure I dont think it fixed anything. Kind of at an impasse. I have dont the spray around intake tubes and no RPM change.