hi, have a 2007 attitude. i did the 3 minute pressure test and my guage didn't move,,,,however, i left it on and i noticed that after about an 1 hour 20 minutes it went from about 7 inches to 6 inches.
would this be concerning. i kind of like everything perfect but if this is no problem, i don't want to spend hours chasing a micro leak. . i have soaped about everything with no bubbles.