07 F150 5.4 misfire?
08-23-2016, 06:30 AM
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07 F150 5.4 misfire?
Guys,
I have an 07 f150 with the 5.4 4wd. 92,000 on it. I have an edge evolution tuner set on performance level 2. Only thing I set was tire size. All of the plugs and coils were done at approx 83-85,000. At 88k I had #4 plug and coil replaced again because the truck began to buck under load and it came up as misfire cyl 4.
All has been good until last week it started doing the exact same bucking and shuttering under load or on incline. The problem is that the CEL is not coming on so the scanners aren't pickin up where to look. I do have an inbound O2 sensor reading kinda sporadic. Would that cause the same issue?
What else could I be dealing with? Transmission maybe? Would the tuner be causing plugs or coils to foul?
Help please!!
I have an 07 f150 with the 5.4 4wd. 92,000 on it. I have an edge evolution tuner set on performance level 2. Only thing I set was tire size. All of the plugs and coils were done at approx 83-85,000. At 88k I had #4 plug and coil replaced again because the truck began to buck under load and it came up as misfire cyl 4.
All has been good until last week it started doing the exact same bucking and shuttering under load or on incline. The problem is that the CEL is not coming on so the scanners aren't pickin up where to look. I do have an inbound O2 sensor reading kinda sporadic. Would that cause the same issue?
What else could I be dealing with? Transmission maybe? Would the tuner be causing plugs or coils to foul?
Help please!!
