I have a 3.7L Nitro and when you lightly put your foot on the gas it takes a few seconds before it starts to move. Like it has a delay or something. Now if I were to pull the plug on the TPS turn the truck on acc wait a min then turn it off then plug it back in turn the truck that will tell it to relearn itself right?
No. ETC (Electronic Throttle Control) relearn can only be performed with the StarSCAN. Unplugging the TPS with likely cause you a check engine light.
There have been methods posted on other forums about performing an ETC relearn to improve throttle response and delay. These methods do not work. When the RAM trucks with the 5.7L Electronic Throttle Body were introduced there was a key on/pedal to the floor/key off method, but that has long been replaced with the scantool relearn.
The throttle body is electronic and unless it is malfunctioning, which would require diagnosis, your Nitro throttle response is normal. Also, coming from a cable throttle the drive-by-wire will be different.