P0306 #6 cylinder misfire

Previous owner informed me he had this problem but it’s NEVER done it to me until now.

Going around a corner it started to sputter a bit. I let off the gas and it went away. It would come and go and then I had the CEL come on flashing so I pulled over shut it off and it would get better then come back again

I checked the code when I got home and it was P0306

previous owner did plugs coils and injector cleaner

When I first got the truck I did the URD DW fuel pump upgrade and installed an external fuel filter so I plan to change that too and wanted a recommendation for next steps and advice on brand of coils and plugs

TIA

 

My recommendation is OE coils and plugs.

If you want you could pull the plugs on bank 2 (the side with No. 6 cylinder)
Inspect the No. 6 plug.
If it looks good, Put that plug in No. 2 cylinder.
Then swap the No. 6 and No. 4 coils.

Drive the truck and see if the problem jumps cylinders.
If so, there’s the problem.

What you are doing here is isolating the components that were on No.6 cylinder.
By putting those components on different cylinders, you now know what part likely cause the problem if it shows up on a different cylinder.

Is it a lot of work?
Kind of, but it’s free. And it’s better than guessing.

 

Do you know what coils were used to replace the OEM? I've had shitty luck with cheap aftermarket plugs on the Lexus 3.5 engine. Haven't had any go bad on the Taco yet, but have replaced 5 of six on the Lexus. The first two were cheap AA Ignition aftermarket coils and they barely lasted a year. One coil that has lasted is an AutoZone lifetime coil, but it cost $90. The last two replacements have been Yec Flamma, a Japanese aftermarket brand. They are going to two years and have not failed, and cost about $30 (#118F).

 

Do as TnShooter suggested above. Next step would be swapping fuel injectors, then compression test.