Need help with this

I have a 2001 tundra and it is at 233000 miles. It started having a misfire at cylinder 4 and Ive swapped the spark plugs, swapped ignition coils and even bought new OEM ones. I even performed a compression test on cylinder 4 and everything is fine. I have not swap the fuel injector yet because of time but I did test to see if the fuel injector is spraying correctly or clogged on cylinder 2, 4, 6, 8 and all of them are fine.

Does anyone have anymore ideas? Thanks!

 

We need more info:
1. Edit your profile to show year, AC or DC, 4.7 or 3.4 and 2WD or 4WD. From your post assume you have a 2001 with 4.7
2. What brand of spark plug and coils did you buy and where did you buy them? Only use Denso coils and NGK or Denso plugs. Never buy from Scamazon or EvilBay. Rock Auto or Summit Racing are your best bets
3. Do you have a code reader? Do you have a CEL and what codes are you showing? If you don't have on go to Advanced or Autozone and get it read. Then post back here.
4. Post some photos of your engine bay both zoomed out and closer so we can see electrics and vacuum lines.
5. What were your compression readings.

 

All the stuff Bryan asked.

Adding to it. Misfire in itself is typically a condition caused from bad air/fuel ratio (unexpected air, excess fuel, loose plug, bad injector), bad spark (bad coil, weak coil electrical pulse, bad plug), bad spark timing (old timing belt, timing is off by a tooth). You can't visually tell if an injector is spraying enough fuel with your eyes. You can technically test if (and how strong) injectors are pulsing with the right tool, but if you had them out to see them spray, I'd have swapped them, that would probably be my next step.

But also, curious, since our V8 is a low interference engine, and having the timing belt snap will potentially brick your engine, the one question he didnt ask: When is the last time you did your timing belt? If you use OEM parts (i.e. Toyota brand, or authentic Aisin brand), Toyota says you can go for 9yrs or 90k miles on that belt/water pump/tensioner/pulleys. Members have found you can push that to 100k or 10yrs. And yes, time is important here, would you drive around on 10yr old tires? The belt is made of the same materials.

With that, I add the questions:

1. When was the timing belt last done?
2. What brand/kit parts did you use for the job?
3. Have you verified the timing yet?