4.7v8 missfire

So i have a 2007 tundra 4.7 v8
Just hit 358000km
I just put on 30000km in 6 months gone though 3 oils changes
I live in the great white northing and now I'm having some issues.
So i fule up at 11am work till 8pm and got home at 9pm
The next morning it was -27c and I let my truck warm up and then my check engine light starting flashing. Missfire in piston 3 and 6 and a generic code
I replaced the coils and spark plug and reset the computer. Turned my truck bag on codes were gone. About 1 minute after check engine starting flashing. And the 4high and vcs starting flashing. I think it's the fule injectors or bad gas just wondering what to do.
And ofcource this happened on the 23 right before chirstmass eve.
If any one has any tips or idea anything helps.

 

Take a sample of the fuel, and check for contaminants and water.

Here's a great way to check for ethanol, water and contaminants. I made my own tester out of a glass cigar tube back when I was a tech. We used to have a lot of E85 contamination issues, and it is a nightmare on vehicles that aren't rated for anything more than 10% ethanol.

https://youtube.com/shorts/wBiUMWXUFl4?si=vua4BxAeVdzD8BRl

 

I will try that tonight or tomorrow morning. But thank you for the info and help

 

Update
It wasn't bad gas. And unfortunately I had to bring it to a shop. How ever it was a bad coil in for piston 6. The shop took out the coil on piston six. Put it on 5 and the code showed up on piston 5. I had the parts in my truck as I had replaced the coil and spark plug for piston 3. So no charge on parts, only labor