Put a new battery in. Now will nott idol unless the airconditioner in on high on 2008 Mitsubishi Endeavor

When the air is off the car dies

Asked by for the 2008 Mitsubishi Endeavor
test electrical system you have something steeling pwr from your ignition system
1 more answer
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.