Don't know how to make my truck pass emmisions replaced everything wires plugs airflow sensors and 02sensors timing belt code p0300 keeps coming up light just will not shut off does anyone have an idea what it could be? HELP PLZ

 

First off, P0300 is a random misfire code and has nothing to do with the timing belt.

I bet it's a problem with your crank/cam sensor, because that's where the ignition system gets its signal from. Either the wiring harness attached to it, or the sensor itself.