07 5.4 miss firing.
11-17-2014, 12:01 PM
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07 5.4 miss firing.
Hey fellas, new to this site. But heres the deal. Bought a 07 5.4 super crew 4x4 3 weeks ago. Ran perfect the first week. Now im having a miss fire like crazy. At first it would only do it when cold. Once it got to running temp it would quit. Now it does it all the time. Worse when going highway speeds when its in 4th gear when the rpms are below 2k. Or up hill. Cam phasers are starting to tick a little but i wouldnt think that would cause the miss this soon? Finally got to auto zone when the check engine light was on to get it scanned, got two codes. P0316 and P0301. Miss fire on cylinder 1. Replaced the coil, checked plug. No change. HELP!!!!!!
