I have a Honda City ZX GXi 2007 model. I recently got a sequential CNG kit fitted on my car. The vendor initally told me that it will give an average of 24-25. But after running it for 3000 km the average has dropped to 18. The gas tank takes around 8.5 kg -9 kg gas. Secondly the car jerks in 2nd gear.
Can some one please tell me what could be the reason behind the drop in mileage and the jerk issue.
Thanks in advance
PM