Problems with Jeep Grand Cherokee 3.1TD

I have a Jeep Grand Cherokee 3.1 TD Laredo of 2001 and 2 days ago he has a problem he has no strength but only passes when he is recently torn off, I don't know what to do it, I don't get any fault in the diagnostic machine and he doesn't have lighting lights on, he does not know what can anyone have? I have tried everything I can't think of anything

It is a little frying these cars but you can shine it with real -time parameters with the vehicle in test. If that way you have to throw some fault code to begin to rule out part by. Do it and let me know to help you