Hello! Was hoping I could pick the brain of some of you.

I bought a 2001 F-150 4.6L V8 knowing it had 3 misfires from 2, 3, and 6.
I changed the spark plugs and coil packs and when I started the truck there was a knocking/ticking/tapping sound from the passenger side bank. I also had misfires in 3, 4, and 7.
I went back through removed, gapped, checked, and reinserted all of the plugs and coils.
There is still a ticking sound but quieter from the passenger side, and a misfire on 3 and 4.
I'm not sure what my next step would be.

I've also ran injector cleaner through the fuel.

Any advice is greatly appreciated!

 

Were the coils Motorcraft? Valvoline Restore and Protect oil seems to do a good job of cleaning up the engine.