how to i know if my timing belt is bad?? please help

If the timing belt was broken the car would not start at all, if a tooth was missing the car would back fire. So it has to be something else causing your issue

The crankshaft passion sensor? LOL How about the crankshaft position sensor. It may be bad preventing the car from starting.

Hey thanks, that realy help, like i said i replace the crank shaft possion sensor, i check the wires, the wires is good, but still when i start the engine it sound like not enough power..