hmm well after having delve into my 75 ramchargers whole no spark issue It seems to be that the truck is eating ECU's. At first I though that my ECU was not the problem after having tested a known to be good 5 prong ECU. However The truck shorted out the known to be good ECU. I also tried a known to be good 4 prong ECU but it made no spark and it definatley didn't short out.
I took apart my engine wiring harness to see if there were any shorts or anything, but its all factory clean so all that did was waste some electrical tape and allow me to route a couple things more efficiently.
After the ECU's short out they back-feed power down the blk/ylw wire that runs to the negative side on the coil.
Does anyone have an idea of what is going on with this and any possible fixes.
After going through several ECU's and having them all short out I am not sure what to think or how to fix it since it only seems to happen with the 5 prong ECU's and I get no response one way or the other from the newer 4 prong ECU's.
(bad coil, was shorting out my ECU's with five prongs and it was giving no spark replaced coil threw in new ECU, got spark gained and gained a pretty bad short somewhere so I'm onto the next issue)