I have a 92 sc300. When I come off the highway and disengage the cruise control I have this problem. When I come to the end of the exit ramp and hit the stop sign, I hit the gas and the peddle sticks very hard. I really have to step on the gas pedal hard to get the car to go. Anybody had a similar problem? Could it be the throttle body or a vacuum problem caused by the cruise control.

 

I'd check the throttle cable first, starting at the gas pedal and working up to the throttle body (and you may as well lube it up while you're down there

 

I dont have an answer for you but a sticking gas pedal sounds pretty dangerous. I would find the problem as soon as you can.