So I have a confession, and totally understand if I get my membership to this site revoked. I knew I had gone a little to long since I had changed plugs, but I've been busy and it seemed to be running fine. So I pulled one out today and it was a champion...barf! I got to thinking and realized it had been waaay to long and I put champions in there shortly after I bought the KJ due to a misfire and before I decided I like this jeep and wasnt planning on fixing it up. Replaced all six with proper ngk's. I look forward to it running better. Also cleaned throttle body, pcv tubes, and learned that if you forget to plug the brake booster vacuum line back into the intake the jeep don't stop so good. Luckily no harm done while brakeless. Go ahead and let me have it.