XCELLR8
Well-Known Member
I have a 77 400 in my Cordoba and it runs and drives. It has had the electronic conversion done to remove the lean burn set up years ago. I noticed that the ECU box was losing the epoxy in the back of the unit and running down my firewall. I bought the Jegs HI-REV 7500 ECU unit as it was made in America and with all of the other ones being made overseas I thought I would be fine. Well I'm not. The car runs with the stock ECU but when I install the new ECU it will not fire. I have even wire brushed the firewall and ran a ground wire, still no fire. I have changed out the stock ECU with the new ECU 3 times and the car will run with the stock ECU but not with the new ECU. My car is not stock, so that is why I went with the Jegs ECU. Is there a way to test the ECU on a bench to see if it is good? My stock ECU is the 5 pin and the new one is 4 pin and my ballast is the 4 tab style. Am I missing something that needs to be done to run the new ECU? I have read that this should be a plug and play switch.