Having trouble when at low RPMs. After I leave a redlight or when I am coming up my gravel drive way at a low RPM my truck is cutting out almost to the point of stalling but never stalls. First thought was a TPS sensor...bought and installed and nothing changed...does anyone has any idea or have...

My 2001 4.7 Dakota idles good but when you accelerate the pedal it has like a hesitation or loping going on. I have replaced fuel pump, IAC and has new computer. Any suggestions would be helpful, I am thinking maybe TPS but not sure. Thanks