Truck has 122k,plugs changed at 105k.Truck ran like new, then developed this miss overnight. Thinking it may be the coil, I switched with number 6. Erased the code and hoped for a p0306. Same miss P0307. Verified the 6.2 cylinder numbering is the same as previous gas V8s. These trucks do not have an inline fuel filter,is it possible a dirty injector could cause this?

 

bad spark plug,
bad connector for coil
bad connector for injector.

go from there.

you replaced 16 plugs right... bad spark plug wire to lower plug.

 

I switched coils 7 and 6 trying to see if the coil was bad. Erased codes and thought I may now get a P306. No,same misfire,P0307. I made an appointment at an independent garage that I trust for today. This morning I get in truck and all is well. Drove truck quite a bit today and runs like new. Any ideas?

 

https://www.yourmechanic.com/article...-jamahl-walker

so many things.. even harder with problem coming and going.