We COULD NOT get the ecu to read. We had power to the diagnostic connector, we had grounds where we needed grounds, and the serial data wire showed continuity from the ecu pin to the diagnostic pin. When powered we had reference voltage at the sensors, and could even hear the iac power up. We proceeded to check resistance at every ground, power at every wire. and everything tested fine. As we put all the tools away and were about to head home Mike was checking some stuff out on ls1tech and found someone with the same issue we were having and as it turns out some pinouts posted online are WRONG. Alldata included (which I used) and there is a serial data wire that is supposed to go to the body control module. Which my 78 jeep obviously doesn't have. but Alldata tells you its supposed to be a ground. Now what was happening instead of sending signals to the diagnostic connector, it was grounding the serial data coming out of the pcm, and not allowing a signal. cut that wire in half and boom, The software read the ecu. But this was 10:00 at night, and too late to make loud noises. So today is the dyno day.
Such a stupid issue. But these guys are awesome and dealt with this crap for a few hours last night.