Every once in a while, ill b driving then wen comming to stop at the light, i put foot on clutch, and the rpms drop below 500 and the car shuts off... I changed iac, and cleaned mass air.. and it still does it.. Anythin else it could B?

 

Could be your alternator. Id go to autozone and have em test ur alternator and battery. Its free so thats what i reccomend.

 

Might have them run a code scan too. They'll do it for free...