Sorry for the delay in response folks, I didn't get my hands on a fuel pressure gauge yet.
Money keeps getting diverted to more important things (I shutter to say...)
every time the engine stumbled, the pressure dropped like a rock. If one listened carefully, you could also hear the pump "grumble" when it happened as well. "whirr, whirr, whirr,, grrrrr.... whirr whirr.. grr..."