Falha Ford Sport Trac

Good my people
I have a problem with a Sport Trac, 2008 4.0 V6 is something strange and it is not constant , the car is going well for half an hour and from one moment to another stop accelerating, I press the pedal and the revolutions do not upload, but I turn it off and turn it on again and it is fixed, but the problem persists, the truck comes from the Ford, they changed the acceleration body and the pedal position sensor.

Boa tarde Juan, eu tenho o mesmo problema, ele poderia consertar seu caminhão?