So are platinum plugs required on our 4.0's ?
Reason I ask ,is because I bought my truck a few years ago , and it had the original plugs .
Platinums .
I replaced them with regular autolites 745's .
The only problem I have had is that the 2nd plug on the passenger side , always burns the plug beside the ground electrode , or sometimes burn the ground electrode off entirely , after about 6 months .
I am wondering if I have a bad coil pack or a bad wire .
I have looked under the hood at nite , and have no arrant sparking .
Any one have any ideas?