EG500 is an easy-learning debugging of multi-point injection system; for workers, it’s easy to learn for understanding to diagnosis the system. It adopt the oxygen sensor signal and track the Injection signal of original vehicle at the real time by using the source of original vehicle's sensor. Operators modify dynamical the value of gas injection signal and make the gas injection signal and the original vehicle's injection be the same and modifies dynamical in order to make the vehicle more power/lower gas exhaust and lowest emission.