I am novice wing Foiler just discovered my wing has been under inflated the times I have tried to get up on foil was only 3to 4 psi instead of 6 would this have hampered my efforts as I could not get up on foil

Definitely

Yea, the same happend to me on my first few sessions and they were a waste of time - I was never getting up on the foil.

Yes, it's as if the wing is much heavier than normal...
and feels like a "directionless" gusting.

Yeh think I wasted three sessions trying to get up got a gauge that works now so hopefully next effort might be better