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Constant misfire

i had a problem like this.... all i had to do was replace my air filter
 
didnt notice anything with mileage but yes got the check engine light and have already scaned it multiple times. it jumped from cylinder 6 misfire to cylinder 2 misfire. the plug I pulled out of cylinder 2 is just derstroyed badly going to post a pic
 
sorry about the bad pics. and the jeep i am currently driving is a 97 TJ 4.0L I sold my 2000.
100_2381.jpg

100_2382.jpg

100_2383.jpg
 
true i am sure it was before but i have already replaced all plugs, wires, rotor, rotor, and coil so i dont think it is any of those. I also ran the motor with the plug pulled from that cylinder in order to blow out anything that might of been left behind from the bad plug. Just dont know where to go next.
 
Do you have access to a set of noid lights? They aren't terribly expsensive and you can plug it into the injector plug and verify the wirring and ECM
 
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