While I'm driving my car and while the car is in idle if the air conditioner or heat is on the car sounds and feels like its turning off, making the car shutter. The rpm goes up and down. Then eventually the car turns off. I looked online and everything I found leaned towards a bad throttle body. I was wondering if what is going on with my car is really a bad throttle body and what are other effects of a bad throttle body. Thanks in advance for all your advice