Re: Jeep Missing
You can use any brand copper core plug, but our engines donīt seem to like the fancy irridium or other types. I never had any problems with Champions though.
I would first try an other coil with the same plug and check if the same thing happens. Or an other plug on the same coil. If the plugs are old, i would just change them all out.
The #8 plug is a bit more difficult, but with an extension and maybe a hinge it is not too bad to do. Donīt forget the ground strap on the #8 coil when mounting it back again.