Engine light on, first code was knock sensors and random misfire , changed knocks sensors , that code gone , random misfire returned after , changed spark plugs and wires, had injectors cleaned, injectors sensor changed, Truck runs great , doesn’t overheat , doesn’t smoke. Starts up every time no loss of power , I need to smog but can’t with engine light on , cleared and checked with OBD and same code P0300 random misfire any Ideas?
