The pressure should be 4 lbs - it is really hard to get 4 lbs in there. Just testing the pressure takes a pound or more. Get a guage that measures 1-20 lbs. If you have access to a tank - release it down to 5 to 6 lbs & fill up the fork. If you measure 5 or 6 lbs it's already down to 4 - don't measure it again. Its a small quanity of air. If you release all the air it takes about 1 second. Good luck
Thanks for the help, it is difficult to put so little air in, seems to have improved the suspension, but it could be my imagination. Should be a great weekend for riding the Hill Country Snoopy, Have a great day.