NCDON

Continuing with my fall maintenance I want to now tune of my 99 XJ. I am planning to replace plugs, distributor cap and wires. Am I missing anything? Are standard Autozone and Advance parts good to go?


Spark Plugs. Under the hood says Champion RC12ECC, is there an updated plug the would be better to use? If it makes any difference it has ported intake and throttle body and a header.

GreenXJ98

Champion copper plugs are what most people swear by.

Crazy 8s

Air filter, lube the zerks, oil change, perhaps fuel filter, check coolant, check differential fluid and transfer case fluid...

tjwalker

Don't forget the rotor. Check or replace air filter.

And tuneup time is always a good time to review when the last time each and every fluid was changed and things like radiator cap, thermostat, hoses, etc.

Fred/N0AZZ

Along with all the above might as well get a new coil also and I installed a set of reman injectors at the same time.

NCDON

How about the plugs, is the under hood sticker plug Champion RC12ECC, the best one or has a improved plug come alone since 1999 that would be better?