I thought my coil was going to last week, some said they have 150,00 miles on their coils and some said using non-oem plugs was the problem. I put the eom plugs back in and it runs fine again. Check for moisture under the wire ends at the coil. I have 55,000 on mine and like I said in my thread its started running bad while we were driving it and the next day I took the E'3 plugs out and they looked like the threads were galled up. Thats been two weeks ago and the truck runs and idles fine with the oem plugs back in.
2007 XLT Super Cab 2.3 5 Speed Auto 2 WD