When searching for the problem, I found that I have Knock sensor #2 is faulty, I changed this sensor, this solved some problems but the performace still poor when kick down or when I press the kickdown switch while accelerating.
I mean, when I kick down the tourque is poor and when I continue pressing the kickdown until the 6000rpm all the rpm increasing after about 3500rpm are loosy and the car doesn't accelerate as it should.