i said " if the car's throttle is controlled by computer/ECU cng will not run on it smoothly no matter what engine it is" if the car's throttle is controlled by ECU its obvious that it has electronic throttle daa .
@ salik990 and Vajih102
old cars have ecu but the throttle is still manual like cultus efi but in all new cars DBW is utilized. efi engines have different cng kit which has its own ecu so cng runs smoothly like the thai altis. in pakistan that cng kit has not been launched yet and once some member posted that he has the efi kit but it costs 70k