Truck turns off at a stop light

Could be leaking fuel pressure regulator, low fuel pressure, exhaust leaks before o2 sensors, fuel filter, clogged catalytic converters. If you push the throttle after it starts does it still die?

I changed the fuel filter it wasn't dirty. Im a girl and im new to this.I tryd checkn for vacuum leaks but its hard. The truck will start sometimesthe first and at times I have to do it like two to three times bfor it catches. After that my truck will run fine but like I said when I come to a stop it dies then it'll turn on. Its very rare that it won't die when I stop. How do I know if my iac valve is bad?I have tookn ut off tge throttle but left it plug in and I could hear the motor turn on but the spring inside it won't move or anything. Dont know if it's suppose to do that.I was guna ask you when I changed the pcv valve I just used simple heater hose.I didnt use no booy or anythng like that.

Im sorry no it dont die when I push the throttle. It will stay on then after awhile the truck will turn off on its own.