As some of you may have seen, I bought the 1990 780 that sat in the for sale section for a good while. So I?ve got it home and have spent the last week or so trying to figure out why it will not run. I have had a ton of leads on why by scouring this site and the others for answers, but every time I hop in and crank it over, cranking is all it does. So, it fires up with starting fluid through the intake manifold, there?s the spark. I pulled the fpr and got a ton of fuel out of the rail while cranking. I also replaced the dead in tank and put on a spare fpr I had just in case. Cleaned up a number of grounds, maybe not all or even important ones. I pulled the wires out of the radio suppression relay connector and connected the two that need to be (what I seem to have there is a brown wire straight to battery and a grey or white wire to the resistor pack) which doesn?t match any other wiring diagram I have seen, but continuity has led me to believe that is exactly what they are. Now for the potential to pulse. I put the obd port deal to the setting that will pulse the injectors, and it did so perfectly across all 4, and turning the engine over right after even got me a moment of firing over. I?ve ran a wire from pin 18 I believe to ground to simulate a ground of the Ecu and got nothing from the injectors. I found corroded connections at the resistor pack, so I cleaned them, but it had already went through the diagnostic pulse thing, so that shouldn?t have been the culprit, but I?m out of ideas here. A spare ecu was laying next to the original on that was still mounted in its chassis when I got the car, and the harness was plugged into it. Maybe I have 2 bad ecu?s? Maybe the ecu has to be mounted to the chassis to work for grounding purposes? I appreciate any ideas you all could offer.