The culprit: Champion "Platinum Power Premium Spark Plug, part number 3034 RC12PEC5". Look. I've put spark plugs in everything from a 1971 Ford Torino to a 2008 Suzuki V-Strom. I didn't expect a problem putting spark plugs into my Jeep. I mean, fuck. That goddamned I-6 engine dates back to before I was fucking born. So I took the spark plug coil rail off, and grabbed one of these spark plugs out of the box and... what the fuck? The goddamned electrode was set at like 0.60, when a Jeep wants 0.35. Well, fuck, that's not a problem, you just rap the plug on the front bumper with your feeler gage at .35 between the electrodes and... what the fuck? The goddamned electrode won't fucking bend straight it's so over-long for the gap required for the Jeep 4.0L I6, it's like all half-ass and shit? Yeppers, I tried it on two different plugs, same goddamned result. There's just too much motherfucking electrode for a Jeep 4.0L I6.
Fuck this shit. I threw these goddamned piece of shit spark plugs in the fucking trash. I'm going back to the parts house tomorrow and get some better plugs. Sue me for fucking cheaping out on spark plugs, I shoulda known better. "Platinum" or no, these are fucking bottom feeder piece of shit spark plugs, not fit for my worst enemy's car, much less my own.
-- Badtux the Rude Penguin