1995 millenia 113000 miles, just got the car. while driving the car will hesitate and then stall. it is not making any loud noises or anything. only way i know its stalling is by the loss of acceleration. however after it stalls and i wait about 5 mins it starts right back up. yesterday after it stalled and i had the hood up i did hear a kink of hissing noise though.... like air escaping.....i dont know if this has anything to do with it but the heater isnt working either. no check engine light either.....thanks for your help!