I got a 2001 Ford Mustang 4.6 that just developed a miss after throttling it pretty hard. check engine light came on, diagnosed cylinder 1 misfire. swapped number 1 coil and it leveled out. I drove it for a minute and throttled it again and the miss came back. changed the coil and the same thing happened. took number 1 injector out and cleaned it and installed new o-rings. has 150psi in the cylinder. new plug. coil connector does not appear to be burn or anything. has any one had this issue and if so, what did you do to fix it. it seems like after the coil is put on the engine it runs fine until it gets up to operating temp or its throttled pretty hard.
thanks....
thanks....