05 engine in 04 Jeep misfire

[Zeus87]

I'm stumped.

I put a low mileage 05' 4.0 in my 04' 4.0. I swapped everything over (sensors, tb, intake manifold, odpa, etc).

Anyway, I have a slight misfire that isn't setting off a check engine light. It fires up as it should, idles as it should, but there is a periodic studder in the engine. It's worse when cold, but it can be felt when at operating temp as well.
Any ideas? was hoping cam sensor, but I dialed it in with my scan tool and I have the same issue.

 

[Zeus87]

I'm stumped.

I put a low mileage 05' 4.0 in my 04' 4.0. I swapped everything over (sensors, tb, intake manifold, odpa, etc).

Anyway, I have a slight misfire that isn't setting off a check engine light. It fires up as it should, idles as it should, but there is a periodic studder in the engine. It's worse when cold, but it can be felt when at operating temp as well.
Any ideas? was hoping cam sensor, but I dialed it in with my scan tool and I have the same issue.

@mrblaine I'm hoping you can chime in as you've assisted me with similar issues many years ago.

 

[mrblaine]

@mrblaine I'm hoping you can chime in as you've assisted me with similar issues many years ago.

How long did you leave fuel sitting in the tank?

 

[Zeus87]

How long did you leave fuel sitting in the tank?

2 weeks at most. Compression is good as well.

 

[macleanflood]

Noid lights on the injectors or laser temperature on the exhaust tube to identify the misfire?

Check wiring?

-Mac

 

[Zeus87]

Noid lights on the injectors or laser temperature on the exhaust tube to identify the misfire?

Check wiring?

-Mac

Can I swap the injectors from the 05? I used the setup from my 04'because I knew they worked properly. I tried with a laser, the misfire is so inconsistent I couldn't get enough fluctuation in temp to determine which cylinder was giving me a problem.

 

[macleanflood]

I have a 97 so I don't know offhand...but...if the plugs are the same go for it.

-Mac