08 JK engine miss ,baffling.
08 JK, original owner 125K miles or close to it, Started out as a slight "bump" when idling, then went to a miss after warming up then backfired driving on freeway. After all of this it would not thro...
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Glad you found the problem, as you can see from my original post I had a cracked spark plug also and it was very hard to see.
