Ford F 150 2011 fault

I am checking a F150 that does not progress, the pump is fine. The problem is that the fault does not make it constant, it takes 25 days to present it when it reached a stop did not advance and the revolutions did not go up when oppressing the accelerator pedal with the agency's SCAner does not give failure codes in any module. By letting her rest for a short time she works without any fault, they tell me that these trucks fail their acceleration body if a similar case has passed to them.

Hello, something similar happened to me but in a Peugeot 306 the problem was the coil when it is heated does not give you power I leave it as an example may serve you, greetings.