One time I ran into this where the
stock ECU worked and the car ran but it would not run when I bolted the orange MP ECU on it. The car was an original 318 and had been changed to a bigblock. What I found was the two wires to the dist pick-up got crossed. The Standard ECU would run with the pick-up wires backwards but it would not run with the orange ECU until I reversed the pick-up wires and then it ran with both. The harness on this had been modified for the bigblock and the wires got crossed in the change. If your harness has been changed or worked on I would check it for this.
Easy way to tell is to unplug the dist 2 wire pick-up plug. Then turn the key on and hold the coil wire about 1/4" from ground. While doing this with the key on take the
wire harness side of the pick-up connector and touch or scrape the male terminal in the
wire harness side of dist pick-up to ground and it should spark. If it does not put a cotter pin in the female terminal of the same connector and try it. When I did this I got the coil to spark when I did this with the cotter pin in the female terminal on the connector which is wrong as it should spark when you scrape the male terminal to ground. If it does spark using the female terminal the pick-up wires are crossed and need to be switched. Its funny but some ECU's will still spark with the pick-up wires crossed but not all will. Ron
