2006 mustang gt fuel pressure
 

I am still fighting a hesitation in my Roush supercharged mustang.
Today I was doing some datalogging with my sct and I noticed that
under most any kind of load I would see the fuel pressure drop to as low as 30psi.
and the fuel pump voltage would climb from about 8 volts to about 10.5 volts but I never saw it hit 12 volts.

anyone ever watch thier fuel pressure and pump voltage?
I am thinking it may be the fuel pump module, but how do I check it?