Perda de energia em Couer 2001

Olá saudações para T2.
Well my problem is the following I have a 2001 Ford Couer pickup and the fact is that after some time the pickup is on the stop accelerating, do not turn off but if you step on the accelerator no longer respond, I turn it off and turn it on and walk well for another time but then you start making the same failure, I already changed the gasoline pump and the empty valve of the gas tank mention that the injectors also wash,
if they could give me any tip or advice on my fault, I will Aprecie
o salu2 do mex
ppon