Got my first CEL in the Mustang today. Ran by autozone and it came up as the fuel rail pressure sensor. Anyone have a lot of experience with the 4.6L and this problem? Luckily the sensor sits right on top of everything, but Im not certain if that is the problem, hoping it is not the fuel pump. Changed the fuel filter about 5k miles ago. The car has had the tiniest stumble while cruising on the highway lately. No problems while idling or acceleration. thoughts?