Hey, guys, I drive 2007 4.0 fx4 level 2 which has been having misfire issues in cylinder 5. I have replaced all spark plugs, the coil, and wiring but still having trouble. any help would be appreciated.

 

At this point, IMO, you will need to do a compression test

The 3 things that allow a cylinder to fire are:
1. spark at the right time
2. Gasoline with the correct mixture of air
3. Compression

Compression is often the first thing to test because it is black and white, can't test intermittent like spark or fuel

Since you have changed spark plugs and coil, make sure coil spark plug wires are correct
3 4
2 6
1 5

The 5 6 4 side is easy to reverse, at the coil and at the spark plugs

So only fuel and compression are left
You could swap injectors, 4 and 5 or 5 and 6 to see if problem changed to the other cylinder.
You can test injector, only IF #5 misfire is constant not intermittent, it should read 14 OHMS, 11-18ohms is spec

But testing compression would take that off the table or tell you it is the problem so you don't waste time and money on non-fixes.
2007 4.0l SOHC engine runs 9.7:1 compression ratio
So should test at 170psi in each cylinder
You need to test at least 3 cylinders, all 6 is better, but 3 minimum, that takes compression gauge and battery condition variables out of the results.

If results are
#4 165psi
#5 140psi
#6 170psi

Then #5 has an issue


Why you need higher compression:
Contrary to what you see in the movies gasoline doesn't burn easily, lol.
Only gasoline FUMES can be ignited by a spark
Gasoline is a liquid in the gas tank and is a liquid when it comes out of the fuel injectors and passed intake valve
When it is Compressed it is heated up and becomes a vapor so can be ignited by the spark plug
Cylinder needs at least 30% gasoline vapor to fire, once it "fires" that heat will vaporize the rest in the cylinder
Cold engines still need to be "choked", choke plate on a carb added more gasoline by restricting the air flow, so more gas was sucked out of the Jets
Computer does this for fuel injection, cold engine(ECT Sensor) adds up to 3 times as much gasoline for cold start.

And the reason for a Choke is all about Vapor, the colder the gasoline the less vapor it has, say it is 5% vapor at 40degF, to get to the magic number of 30% 3 times as much gasoline is added, for 15% then compression adds the other 15% as it heats up the gasoline.
Lower compression means misfires even after engine heats up, fuel calculations are based on vapor content needed in the 14.7:1, air/fuel ratio