5.9 swap in 71 dart

Having problem car not starting every time. Car has compleete swap including computer. Hot wires said to put push button starter switch in. It's been done. Will crank one time and run but next time it turn over but not crank. If anyone has any info please help

Are you using The Hot Wire Auto - Hotrod Harness or a factory harness from a doner vehicle?

I had to connect Start 1 & Start 2 together to get continuous 12V from the key as the switch was turned to and released from the cranking position to the run position run or the car would do the same thing.