... premium, with OBD adaptor. We can supply ECU,which is used in cng sequential injection system. ... , it can make communication with the original vehicle ECU.2.OBD function, it can diagnose the failure ... injection dosage with the relation to the engine's RPMS4.Self-calibration and self-correction function, precisely ... oil curve and gas curve. Keep the engine's power, torque indentical to petrol state.5.Auto ...