03-29-2020, 05:23 PM
I’ve got a 91 2 door with manual transmission. The idle speed increases when I turn on the AC, but doesn’t rise when the heat is turned on, or headlights, or steering wheel is turned at idle. This is a huge mystery to me. I tend to use my vehicle as a mobile work light so being able to keep the battery charged at idle with lights on is super useful. Cheers!