Just my opinion but at this point with the provided symptoms and your reported T/S results (?) it doesn't seem very logical that the ignition switch or the ignition or fuel pump control relays would be the issue. Didn't you report that the relays have been electrically bypassed out of the circuitry early on.
Now that you've established that the car only runs (obviously super rich) until the AFM is plugged in - it proves that the injectors can be fired. IF you have gone down through
all the previous suggested T/S steps - have you been able to swap out the computer from the local parts car ?
John we are just trying to help
- just remember that no matter how complex a problem seems to be - Troubleshooting is simply a process of logical steps to eliminate or verify the correct operation of each component one at a time. In rereading your responding posts throughout the discussion it sometimes seems that you may be skipping over some of the suggested vital test points.
Perhaps Neil can review this posting and add some new informational insight.
Michael