Accel coils have a short life in my truck.
I have a 1999 F150 extended cab short bed truck with the 5.4 engine. Three years ago, I bought eight and installed six Accel coils. The remaining
two were a replacement coil on cylinder #8,and an original coil on #7. A year later, the accel in #1 started to missfire, and was replaced with another accel. Today, after three years, I replaced the #3 accel with my last remaining coil. Later this week, I'll buy two more accel coils to finally replace the #7 and #8 coils, and make them my spares, which I'll keep in the truck. When the coils start to go bad, there is short term periodic missfiring, which eventually goes to total missfiring at that cylinder. Lucky for me, I have a scanner that has been pinpointing which cylinder has trouble, but it does take a hundred miles or more sometimes to set a code.
The original coils went well past 150k miles before the first one (#8) went bad. The accels only have 20k miles total, and I have already replaced two. My wife drives the truck, and she is nervious every time she has to leave town. Today was our third tow of a long distance, with the second tow home being a month ago when the #3 began its periodic missfire (the code finally set this week).
Has anyone else had issue with Accel coils for this application? Also, how have you resolved plug boots that are stuck onto the plug? My #4 cylinder has an accel coil pushed onto the old boot because the boot has become attached to the spark plug. I would like to replace the plug with a new one, but the boot will not come off. This is the worst cylinder to deal with, and the top of the boot has a small tear in it from having tried to remove it with curved needle nose plies. I need some good advice , anyone out there with a good tip? thanks , edman.