B.Edmonds

Can you post a log of the start up?  That would help. 
Also, check the idle valve isn't stuck, that's quite common.  To free them up, we take them out, leave them connected and spray some penetrating fluid in, while setting the aux out to PWM test at about 10Hz.
 
At a glance, I would increase your max. clamp in the idle speed settings, and also try a higher idle proportional gain. (although your idle screw might need opening a touch)
 
HTH,
  Richard.
 

I dont know these engines well but the idle valve aux output is set to 20Hz, that is way lower than typical and I suspect the valve wont control well at all like that.  More typical is 100-300Hz.  Most ford valves seem to be happy around 150Hz.

Would it be a 2 wire Ford idle valve?
If you need some throttle before it can start, it might mean that you are injecting too much fuel.
Try to use less and see how it goes.
When the engine does not start, did it kick back at all?