I have an 04 955 Turbo with a CEL and codes P0353 and P0303 (misfire cyl 3 and ignitiion coil cyl 3). I had multiple misfires and just replaced coils and plugs. I have tried moving coil and plug around and the codes remain exclusive to cyl. 3. My mechanic suggested next step would be to test continuity from DME to coil. I am going to give this a shot but I wanted to see if there were any other suggestions while I am at it. Thanks for any info.

 

I have this issue. Did you figure it out ?

 

I figured it out some of the wiring for the coils was losing its plastic coating and causing the vehicle to throw these codes

tldr take off that wire wrap and check for breaks