2003 aerio sx , stalls,chugs only drives at speed of 40+
 

got a 2003 aerio sx , stalls,chugs only drives at speed of 40+ ,if the car has been sitting for couple of hours runs and idles fine,then if i drive it around it stalls and wont run unless iam going 40mph,ive replaced fuel pump,maf sensor,throttle position sensor,fresh gas ect... any ideas,giving me a code of dtcfrzf p0128