We've got a non running 84 245. Several weeks ago it started running rough. It has gotten worse to the point that it will only fire and run (it sounds like) on 3 cylinders. The engine shakes pretty badly. It doesn't have enough power to actually drive. We checked the recently replaced timing belt and it is still lined up correctly. We pulled the fuel rail and all the injectors seem to be working fine. The spark plug on #3 was pretty sooty. We put in a new fuel filter. Both fuel pumps seem to be working. It has new MSD plug wires and a new cap and rotor. The timing appears to be ok but it doesn't run like it. Any ideas? I haven't tried unplugging the air mass meter yet to try the "limp" mode. Any ideas? I know somebody out there has been there. Thanks for your help. Rick