The accelerator pedal of Valin Heavy Truck is too heavy.

There are generally two kinds of automobile throttle structures. Generally, the accelerator pedal is connected with the accelerator by a cable. You can turn the accelerator pedal sink to see if the accelerator is not cracked. If the throttle doesn't crack, add some oil to the throttle cable. There is also an electronic throttle. Check whether there is a hairpin on the pedal.