When the air is off the car dies
Put a new battery in. Now will nott idol unless the airconditioner in on high on 2008 Mitsubishi Endeavor
test electrical system you have something steeling pwr from your ignition system
The computer needs to relearn the idle speed. Take the car on a long drive with the A/C off. Lots of 40MPH plus. It will relearn after 10-15 miles.