Cylinder 5 Misfire

Hi All -

2014 Toyota Tundra 5.7L

New to Toyota's in general, but I've been chasing a Cylinder 5 misfire (per code).
Ive noticed it stumbling a little bit after first starting the past week or so but as I go down the road to the stop sign, 70 yards from my house, it clears right up. However, yesterday it threw the code and never ended up going away.

So far:
-Swapped the coil on 4 & 5 but still getting a 5 misfire - not coil?
-New Denso Iridium plug - not plug? (old plug didn't have carbon build up or anything either)
-No coolant in oil, no white/blue/black smoke while running previously
- Is there an easy way to check for stuck or bad injector?

Trying to avoid paying a mechanic to diagnose if it's straightforward.

Thanks in advance.

 

I would do a cylinder leak down test, that would verify bad rings/ burnt valve, or tight valves. I would swap injectors first though.

 

Check the ground cable by the battery. I got misfire, because that cable that grounds to the fender got severed.