i think u shud tune up CNG from Hyundai Sajjad Motors, the person there is MUSTAFA. tell him problem he will make it more good.
whereas average is concerned my santro is giving 115-125 Km in long routes with AC and within city it is giving 90-95 with AC.
Plz change its air in-take the pickup problem might be due to this. buy a new one. remove cables and if taped from inside.
also infom me if it works