I am stuck in a very confusing situation. I have a 85 CJ7 with a 360. I recently installed a new 360,EZ-EFI fuel injection and an electric fan. I am having charging issues since getting it running not sure if its related but it would seem. I thought it was a bad alternator so i swapped it worked fine for a day or so then no voltage. took it to a shop (which i hate to do) and they said the alternator need to be a high output due to needing more amps for the injection and fan. They charged me 300 dollars and installed a NAPA 120 amp alt. Worked great for a few days again and then no voltage. I have pulled the fuse for the electric fan and it didnt seem to change. The alternator is the AC Delco one wire style. It has 8-12 volts on the white wire (Excite) and the case seems to be grounded since I am getting continuity between it and the battery with a multimeter. I tried the old wire jiggle to no avail. I pulled the alternator and swapped in the old autozone one that was on before and it worked fine for me for the first 2-3 starts and then first test drive. I parked it for 10 minutes and started it back up and now no voltage other then battery voltage. I had the Napa alt tested and it tested good 14.8 volts so any ideas on the problem? It seems that i have excite going in to the alt, ground and the wire coming off is new, not that it matters since testing at the alt output shows no voltage. Im stumped and dont know where to go from here.