2.4KJ Misfire

[ClarenceSteyn]

Hi All. My name is Clarence and recently bought 2003 KJ 2.4litre. I reside in Limpopo Province in South Africa.

Jeep was running fine but took it for service. Long story short I also replaced plug leads and about 2 days later engine had misfire. Ran DTC and showed ignition problem on 1st cylinder. Repaced spark plug and vehicle ran fine for a day then misfire came back and is worse now ie. running on 2 cylinders only. Due to the holidays I can not run DTC as bloke is still closed. Any ideas?

Regards.

 

[LibertyTC]

Welcome to the forums.
The 2.4 did have issues re misfires and plugs and updates were recommended. The Jeep tech service bulletin was # TSB #08-034-03.
http://starparts.chrysler.com/tsb/en_us/dto/pbd2/08/00/22/080022dc8142d56a.pdf
All 4 spark plugs should be replaced together. Are these ^^ the plugs you have installed with .040 gaps?