I have an 04 f150 lariat 4x4. Had a window regulator die the other day. While replacing it, the battery died from testing the new regulator a few times. After I charged it, I'm having a few electrical gremlins. The check engine light started flashing and it was shaking and kicking while trying to speed up. Also, the AC isn't blowing cold. I had that happen one other time and I believe the flap that closes off the heater wasn't closing because I turned it to all the way hot and then back down and it started blowing cold again. This time that hasn't worked. A few months back my truck was shaking like this and the code it was throwing was for cam position sensor i believe. I read that sludge build-up could cause it, so i changed the oil and it cleared it up. This time I don't feel like that could be it since it all started after the battery died. I have unplugged the battery to reset the PCM but that didn't fix it. Help guys!!!

 

Kicking and bucking? Grab a saddle and head down to the fair grounds.

I'm guessing you have a 5.4L

 

Yah 5.4L

 

I will let you know the codes when I get it scanned. I read something about ac wire harness arcing and causing problems, would it do this?

 

Disconnecting the battery cleared the codes.

 

Yes but it only took a quick test drive to bring them back

 

Okay, i got the codes pulled: P0351 and i believe the other was P0355 They were Both Ignition Coil A (the other was E) primary/secondary circuit malfunction. I replaced all my coils around 10k-15k miles ago and a coil still wouldn't explain the AC actuator flap thingy crapping out on me. Are there any relays or fuses that would control the two?

 

Did you use cheap Ebay coils? The reliability record on those isn't that great, which is why we recommend you get a V-10 set when you buy them. Swap #1 coil with #2 coil and #5 coil with #6 coil, see if things change.

 

I think I did use cheapy amazon coils. I just can't believe two coils and ac go out at the same time. Took it to dealer for recall notice and they are flashing the PCM but they wanted 200 bucks to look at the issues so no way I'm doing that. I have a new baby, disposable income is a thing of the past. So there aren't any fuses or relays that could relate to both? That would be too good to be true I'm sure....