Got it running!

[Factory Guy]

Originally Posted by Custom 68

When you say force the fuel pump to run what do you mean? It should run a few seconds with key on, then run continuously once it is started. You can also check the fuel pressure at the fuel rail to confirm it is correct.
Once you have that sorted out there is always areas in the tune that affect the idle. that may need to be adjusted, are you doing the tuning or do you have a tuner?
Dave

When I say force it to run-the truck has the 1987 and later square body dual fuel pump selector switch. If i depress the switch in the left tank position and hold it down it acts like a momentary switch and it forces the fuel pump to run? Don’t know why but it does this. Ecu was “tuned” by Brendan at LT1swap.com.