Left side 4.7 not firing

[Uhthoffdodge]

Any one heard of a whole side of engine in a 4.7 not firing. It's not PCM. The dealer checked.

 

[MegaMouseGW]

Might be a harness problem. Is your 4.7 one of the ones with the coil on plug setup?? Or does the 04 have the distributor still. My experience is more with the 07 version (3 trucks I own 2 had the 4.7 which got replaced and the third still has its 4.7) which is coil on plug. If it is COP then you should check the harness for rodent chews or places where it might have been rubbing. Only other thing it might be is the TIPM.