I have a '91 F 150, 5.0, auto, that began to run rough and finally stalled a few weeks ago. I have changed th EEC relay, dist module, coil, wires, plugs, distriubutor, cap, rotor, and finally the EEC itself. I get no codes and the timing is correct...but it runs rough at 1,000-1,400 rpm. The truck will run fairly well without the spout installed. Put back the spout and it runs rotten. In a futile attempt I re-re-placed the dist. module and the EEC with no improvement. Hope someone can help, it's driving me nuts!