Cylinder 4 misfire. Please help!

[Matt0901]

I have a 2012 Jeep Wrangler with only 70k on it with a cylinder 4 misfire. I changed everything including a new cylinder head. Prior to replacing the cylinder head I was getting misfires from cylinders 2, 4, and 6. Any suggestions are much appreciated! Items replaced are catalytic converters, oxygen sensor, spark plugs, ignition coils, cam sensor, remanufactured cylinder head with rockers and valves and fuel injectors. And the correct fix will get a case of beer of their choice.

 

[HighwayTrout]

How many miles since the repair?

 

[Matt0901]

None...

 

[jeeeep]

I didn't see wiring checked on your list, did you check the coil plug wiring for pushed in pins, signal, resistance?

What is the code or codes?

 

[Matt0901]

I didn't see wiring checked on your list, did you check the coil plug wiring for pushed in pins, signal, resistance?

What is the code or codes?

Only code is cylinder 4 misfire. The pins all look fine. I have not checked the resistance. I'm terrible with wiring/electrical work but I did order new pigtails for the injector and coil.

 

[jeeeep]

Only code is cylinder 4 misfire. The pins all look fine. I have not checked the resistance. I'm terrible with wiring/electrical work but I did order new pigtails for the injector and coil.

no other stored codes?

At this point, with everything you've already done, I'd do a compression test.

It was a much easier process when there was a central coil pack with wires.

 

[OverlanderJK]

You need to drive them to get the drive cycles. Does it actually have a misfire you can feel/hear?

 

[Matt0901]

You need to drive them to get the drive cycles. Does it actually have a misfire you can feel/hear?

Yes, I also had the misfire counter on Jscan running. It has close to 200 misfires on 4. I don't think it fired once

 

[Cousin Clyde]

I have a 2012 Jeep Wrangler with only 70k on it with a cylinder 4 misfire. I changed everything including a new cylinder head. Prior to replacing the cylinder head I was getting misfires from cylinders 2, 4, and 6. Any suggestions are much appreciated! Items replaced are catalytic converters, oxygen sensor, spark plugs, ignition coils, cam sensor, remanufactured cylinder head with rockers and valves and fuel injectors. And the correct fix will get a case of beer of their choice.

Wow, that’s everything I would suggest.
Good luck to you, sir.

 

[JT@623]

Could be that coil is bad it happens do you have and old one that was working?

 

[cozdude]

Could be that coil is bad it happens do you have and old one that was working?

This^ swap the “new” coil on cyl 4 to a different cylinder. Do 1 3 or 5 so it’s not on the same bank. Then see if it moves to that cylinder.