Ok, so still making backfires...

I figure its because I overheated my mitsu ignitor and caused the transistors inside of it to become faulty under high load.

It only backfires above 15psi after the car has been driven for 20-30min

If i start the car cold, and drive to warm it up, then give it a nice hard 20psi 3rd gear pull, it works fine and pulls like a bastard.

After the car has been driven on the highway for a while the backfires will start to occur at random psi levels of 15psi or greater.

I figure its because the ignitor is faulty and it heats up becoming ineffective.

The ms fires the mitsu ignitor by grounding it? What does the crane box need? I want the crane box to be the only thing after the ms.

How can we eliminate the mitsu ignitor, thus making this setup cheaper with less parts to fail?