Everytime I have the AC on, it makes the rpms go so low that the car feels like it's gonna stall. what the heck could be the problem?

Like if the AC is on and I'm in neutral, and I rev the engine, when the rpm drops the car shakes like crazy. Pretty much undrivable with the AC on for now. =( Does anyone know what the issue could be?

 

maybe check the alternator/belt?

 

Possibly due to a lose wire or connection, the engine control doesn't know that the AC is turned on so it can compensate the idle for the added load. Probably a good question for the under the hood area.

 

your car has mods and you haven't tune it yet?