2002 Ford Ranger loud chirping and uncommon stall-outs

For the last 3 months my truck has chipped loudly when I initially turn the car on and when I am not on the throttle. It has began to stall out at stop lights and stutter at around 40mph. When it does stall I can easily turn the car off and start it right back up and usually make it to my destination without it happening again. When I am on the throttle I don't worry too much but stop and go traffic is another story. I am hoping this is an easy fix. Can someone please point me in the right direction? I'm thinking throttle body or fuel pump.