Air Conditioner on 99 dodge truck quits when you go up a hill and when get off the gas you can hear door close and air starts again?
You Have A Vacuum Problem. It Sounds As If You Push The Gas For
Power You Loose Vacuum Pressure To Your A/C. You May Have A Leak In
The Hose, But This Should Give A Miss In The Engine. I Truly
Suggest You Search For A Vacuum Leak First, Next Let An A/C Tech
Check It Out. Or Even A Good Mechanic. It Almost Has To Be A Vacuum
Problem. If Anybody Can Improve On This Please Do. Thanks !!!!
& Good Luck To You