03 cts codes P1779 /P1795

Question

car starts and runs for like a 1 second and turns off or start car press gas pedal and will run ok until I put it in drive and then rough idle and rough when transmission shifts then the gas pedal will not work when I press it (no acceleration) turn engine off and then restart engine and will drive for short time and then do it again. (no acceleration) it will stay at a low idle.