little to no spark on cylendar 6

[frye8880]

the truck runs rough when started i pulled the wire off #6 and there was little spark. i pulled #5 and it was arching off everything. i have replaced coil wires and checked all grounds and still no luck

 

[wr250rdr]

Did you replace the plug and wire?

 

[Snoranger]

Check #2... they fire off the same bank of the coil, at the same time.