is it turning over at all? go right from the beginning, if its not even turning over either ur starter isnt kicking in, ur battery is discharged or something is binding somewhere, if it is turning over but not kicking in by itself, check ur different fuel, electric/spark, and air components, make sure the ecu is installed correctly, pull ur hazard fuse, and start over, see if it starts blinking any codes, if ur check engine light is on it should be showing at least one code unless the install wasnt quite correct