Mine XLI has a bit diffrent prob, flawless on CNG, on petrol its not accelerating means if throttle is pressed fully car wil move and react like light foot on thrttle, runing in this situation on petrol for about 4-5 KMS the problm solved itself, once showed it to a CNG mechanic he advised me to clean all sensors,but i didn't. cuz mostly i use CNG. soo is it okay ?