Hey guys, got a misfire problem with my '89 5.0. I found TSB 94410, which might have something in it, it has to do with the routing of the plug wires. I just put new cap, rotor, plugs and wires in my truck, and set the timing at factory spec, as per the sticker on the air cleaner. It is also throwing codes 21, Engine Coolant Temp sensor out of range; and 24, Air Charge Temp sensor out of range. But I'm thinking that neither one of those codes will cause a misfire.