Friends: I have a problem with this engine, at times requisitive and loses strength the engine (chanchea), I want to rule out if it is the problem of the motor temperature sensor maybe it had a similar problem.
First check the oil lid and see if it is emulted, then check the water lid and see if it is mescaded with the oil and the last Czech that there is no comprehensive in the water system, that is the first thing. Then Czech that the electro or thermos fan works properly, if all this ok you can have a problem in the water pump.