kayduah

my 2004 rx 300 stalls and jerks real bad. i took it to the shop and was told, it was the fuel pump. i changed it and it did not stop. i went back and was told fuel filter, i changed it and it's still jerking when driving and consuming a lot of gas. Can this be electrical or other things needs to be changed. when at the stop light, it idles okay, but jerks whilst driving as if you are running out of gas. any help or suggestions KD