Crazy misfire cylinder 6 on 2012 jku

2012 Jeep JKU

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Joined
Sep 26, 2022
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Location
North Dakota
Hello All,

This is my first post to the forum and looking to get help with a problem I’m trying to overcome. My jeep has a massive misfire and I already changed the spark plugs and swapped the coil pack of the misfire to a different one trying to see if the coil pack was the problem. Well, after all of that, it still has a horrible misfire and I believe it could be a head problem but the weird thing is whenever I pull the dipstick while changing the spark plugs just start to randomly check there was no fluid on the dipstick. So maybe it burned oil or I have a leaky oil filter housing I’m not sure but I just change the oil and barely crossed 2000 mile mark. So I think maybe it’s a head problem with the crazy misfire cause it is the 2012 3.6 Penta star and they are known to have a head problem. I guess I’m not really too educated on that but even if I change the head I feel like I probably damaged the block running it out of oil I’m not even sure how long it was out of oil I could’ve stopped right away or Jupiter miles without it I’m not sure. Maybe my piston rings are no good either and that’s causing a misfire. I have taken the spark plugs out and stuck a camera in there and didn’t see much. I haven’t done a compression test yet, but if or when when I do, and I figure that the engine or head is no good. so my main problem that I’m asking for help with is to engine swap it what engines are compatible with a 2012 I’ve seen on forums on this website that they are compatible with like 2012 to 2014 possibly, but I’m not sure. And if so, what engines can I use out of vans or chargers, challengers, or 1500s. if you were in my position, would you try replacing the head or just replace the whole engine with a auction engine or how would you go about it? What’s the smartest route to get my wrangler back on the road

Thank you all and hopefully I am able to get the answers. I need much appreciate it.
 
The best reason for buying a salvage yard engine is to tear it down and rebuild it while continuing to drive the original. If the original isn't drivable, (assuming you haven't tossed a rod through the side of the block...) you might as well save the cost of the salvage yard engine. Just pull yours and rebuild it.
 
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Need to get that compression test to see where you’re at…if good compression you could be looking at a simple injector replacement since you’ve done coils and splugs.

Low compression would lead to a leak down test to see where you’re losing it at.