there is no need to type in caps, that is usually consider "shouting".
In this truck, it is possible to use the "on-board diagnostics" to be able to check the 'steps" in the accelerator control to check to see it is working correctly.
my quick wag is that your accelerator control box has lost a c-clip on the part that moves inside to block the operation of the photoelectric sensors.
you should get new or known good accel control box to check or get the manual and use the onboard diagnostics.