A friend's vehicle. Replaced ignition wires (had bad corrosion on #7 wire, wires were old in general). Ignition coil itself had corrosion in terminals. That solved intermittent stalling and very rough running problem. Now vehicle still has misfire on cylinders 4,7 and the primary ignition circuit code. If I had access to a wiring diagram and specs for the wiring to the coil, it would prob be relatively easy to figure out. I know this is not a Mustang, but it does have the 4.6. Any help would be greatly appreciated.