not breaking contact on my coil

What do you mean about breaking contact with the coil?

Some theory: The PIP sends a signal to the TFI, which then goes to the puter. It goes back to the TFI and leaves the TFI as a ground pulse going to the negative side of the ignition coil. Both the rising and falling edge are monitored.

If your coil's ground is constant, look for bad wiring.

Good luck.