03 GT Misfire
I have researched some previous posts and tried a few things but nothing has worked yet. I have a mostly stock 03 gt. I have added a ford racing 70mm throttle body, 75mm trickflow plenum, K&N cai, and a Diablo tuner. The problem started small and has progressively gotton worse. The car feels like it's sputtering and only when crusing at a consistent speed and only some times. I can't feel it when accelerating but I can tell the performance isn't there. I have installed all new plugs, coil on plugs, dpfe egr sensor, and fuel pump. I was thinking injectors next but I hate to spend any more money on something that wont cure the problem. Any suggestions on what to check would be appreciated.