I'm getting code 42 to rich. I replaced egr valve and sensor spark plugs o2 sensor coolant sensor new spark plugs wires and cap and pin are good. New fuel pressure regulator new fuel filter. New tp sensor and idle air control valve. And yesterday started it up and let it warm up. Turned it off plugged in code box started truck then turned on code box wait for 3 zeros and hit test button. Truck idled up and down then died and doesn't start. Please help?