My city 2007 giving problem on CNG. RPM fluctuates between 500-1000.
Every thing on petrol is fine except little long self start.
Today took the car to workshop where Throttle body was cleaned. Mechanic adjusted a sensor (may be TPS) by loosing two screws connecting the sensor with throttle body. He also adjusted CNG kit but could not get any fruitful result.
Can anybody identify the problem or share with me if had same experience with his car?