Quote:

I looked at the wiring diagram links for a 70 challenger and being they didn't have electronic ignition in 70 I assume you wired it in. Where did you wire it in and how did you do it? Here is a link to how to wire it http://www.allpar.com/fix/electronic-ignition.html I would think that you dont have power to the ignition box in start mode from the ignition switch or added wiring.I would run a wire from the battery positive to the #1 pin on the module (if you look at the link posted) and then crank normally with the key and see if the car starts now.



I did not install the electronic ignition on this car, it was installed when I bought it, and ran fine for the past few years.
This has only been a recent issue.

The ECU is mounted behind the glovebox and difficult to access.
I did manage to replace it already and checked for sufficient ground.
I did not do any pin tests on the ECU.