When I start the car it acts like the gas peddle is stuck but once it warms up k

could be the IAC VALVE>> It Regulates the amount of air entering the engine during idle When not replaced, vehicle could experience high or low idle, engine dies at idle and/or severe high idle possibly causing internal engine damage and safety issues Exclusive air flow testing ensures consistent performance.could be a vacuum leak.i assume it's the 3.1L engine?