it's by the computer in the right electronics box under the hood, theres 3 relays two 4 prong one 5 prong, the 5 is the main one 4 is fuel pump and the other 4 is 02 sensor heater, you can swap the two 4's for one another. if you have no spark and no fuel the main suspects are the main relay (if the idle control valve is humming the main relay is powered up) and the refrence mark sensor