Trouble code P0306

Trouble code P0306. I just bought a new to me gen 2 Tacoma with the 4.0 v-6. I started getting trouble code P0306 which indicates a misfire on #6 cylinder. I have changed plugs, injector and coil and the code comes back. Any ideas would be appreciated. I thought about taking the new components and switching them with another cylinder. If the code comes back on the new cylinder then I have a bad component. If the code stays on #6 then I have a wiring problem or computer problem on #6. Is this line of thought reasonable? Thanks in advance, Lotus36

 

^Common early indicator of failing head gasket on 1GR-FE is misfire on cyl #6, caused by coolant leaking into the cylinder.

https://www.fjcruiserforums.com/threads/misfire-6-cylinder-on-08-fj.753819/?u=141962
https://www.tundras.com/threads/p0306.13453/#post-254854
https://www.tacomaworld.com/threads/misfire-cyl-6-at-startup.389664/#post-10715359

You can pull the spark plugs and insert a borescope. Compare the top of the #6 piston with the other pistons.