hi my jeep has around 95k on engine I changed plugs at around 85k it has been running great till today. I started engine and heard a weird noise so I shut it off. I did some looking after I restarted it and noticed the cylinder 2 spark plug wire had popped off during start up. I pushed it back down onto the plug and upon start up it immediately popped off again. I currently do not have the check engine light coming on display. any ideas what could be causing this. it sounds horrible and I do not think it is very safe to drive like this.

 

Welcome to CF!

The only thing I can think of is maybe the spark plug insulator is cracked and cylinder pressure is blowing the wire off. If the plugs are down inside tubes, maybe the plug threads are loose. I know this would happen with the old 392 Hemis.