Mustang S550 plug and play ecu fuel pump prime

[onefastt]

Is there a way to prime the fuel pump in the S550 package? Vehicle is using a return style fuel system. Primes fine with the stock ecu. Can even change the prime time in the stock ecu. Motec turns pump on for about half a second and shuts off. No matter what I try I cant get it to prime any longer.

Where is the prime setting?