How many psi do I need to have to start adding freon to my 2005 Ford 500?
Pay $85-100 and have it evacuated, checked for leaks 30mm of vacuum ...and filled with the correct oil PAG,# and amount. Then filled to the correct weight ONLY proper way, of refrigerant 134A. That's what I suggest..
Search Ford Five Hundred Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford Five Hundred Experts