Hey Fernando , your going to need to check a few thing's ! Is there spark ? Pull a plug wire off a spark plug an hold a screw driver in the end an hold the metal near ground an have a helper crank the engine over ! does it spark ? if yes get some carburetor cleaner an spray into the engine through the throttle plate ! does it try to start ? fuel pump or fuel pump relay could be the problem ! Do you have a check engine light lit on the instrument cluster ? Does your navigator have a little red light on the top of instrument panel , flashing when you try to start the car ? If so this is for the PATS system . passive anti theft system !