Like the title says, changed it today and what a difference it made.
This is not a detailed How to, its so simple that a few pictures will do the trick.
13mm socket, wrench
spark plug socket with rubber insert
anti seize ( optional )
Begin by removing the 4 bolts of the coil.
This is how it looks disconnected. ( note: theres an electrical connection at the back end of the coil, you can disconnect it if you want to make it easier )
Remove the old spark plugs with the spark plug socket:
Here they are for comparison, and after being gapped accordingly:
Ready to install new ones:
Begin by screwing with hands, then with wrench, tighten it about 1/4 turn.
Do the same with the remaining plugs, reinstall the coil and you are done:
All buttoned up:
Checking for CEL:
Test drove it after i was done, and the jeep runs beautifully.......Hope this helps you guys out!
took me about 30 minutes from start to finish, should have done it a long time ago but I kept putting it off......