Possible the drier desiccant bag contents have plugged up the orifice in the drier.

Remove drier and blow through with air line. Clear ? Then blow through rest of system isolating the hi side and lo side as two separate systems.

Possible TXV has jammed closed, nearly closed or blocked..

Ran mine with Duracool up to 200,000 miles. Duracool may not be legal where you are.

FYI : Holding a vacuum is no indication it will hold pressure.



.

.

__________________
[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ]

"A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."