I have a 03 f150 super crew XLT, with 5.4, auto, 4 WD, a few days ago it started surging like a coil was starting to go out. I kept it surging till it threw a code, at the same time the A/C stopped working. When I checked the code that afternoon I got home from work it had P0358 Ignition coil H and also primary/secondary circuit. I changed the coil and the plug still running rough.

Today I hooked my scanner back to it and checked the live data on it and its saying STFT B1 % 6.2, LTFT B1 % -6.2, and on B2 %6.2 B2 % 12.5 bouncing back and forth to 13.2 or so.

anyone had this to happen? or any ideas where to go? I've checked all the fuses. they're good. but haven't done anything to the relays, not sure if they can be checked or how.

Also I checked wires in the plug going to coil, I have a constant power on one wire, and when I stuck test light in the other wire it pulses with truck running. I just searched on here and came up with another post where someone replaced injector?