scooby lude

ive got 93 import wrx, and want to know spark plug gaps,mine is fitted with denso iridum and wish to check them. i think its .7mm but whats that in thou.and also i wish to test actuater, at what bar presure should it start to open and what bar when fully open ,and should it stay open untill presure is relised,if it falls back does this meen its had its day.......thanks any comments welcome