Yeah, I don't get it. Everything is stock and she is running better than ever.
Used the copper core after reading the spark plug threads on here and I gapped them correctly (or pretty damn close).
Only other change besides the plugs are 2 brand new tires on the rear axle after a couple of...
Hi guys, replaced the plugs on my 07 KJ 2wd a few weeks ago. My idle has dropped and is much smoother but my average mileage is down from 18-19 to 14-15. Do I need to reset the computer?
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