I know this is the fuel injection forum but I have a GM OBD1 system controlling fuel and spark in my 82 J10 with a Ford 460. I had trouble with my IAC and found that the stock wiring pinout was wrong for my new Holley Tbody. I reversed the wiring and corrected that issue but ended up with no spark. I have an MSD 6A ignition box and jumped the test terminal and got a very strong spark out of the coil. With the key on I have no voltage at the coil + terminal but I understand that is normal with just the key on. My issue is I don't know the sequence of operation between the ECM and Ignition Control module and coil. I disconnected my ecm to troubleshoot the IAC so I could have disturbed a connection there. I replaced the Ignition Control Module no luck. So does anyone know with the key on what voltage I should be reading at the wiring harness connection to the ICM? My module has a 2 pin and 4 pin connection on one side and a two pin (input?) connection on the other. I believe if I knew what 8 terminal should read voltage wise with the key on I could track the issue down. This system came out of a 91 Camaro if that helps and I a standard billet dizzy with the computer controlling spark. This link has a ICM similar to mine. http://www.fieros.de/en/v6help/code42.html
Thanks in advance for any ideas
Thanks in advance for any ideas
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