Interesting....as i got same model idsi in Rwp and got same issue, someone suggested me a checkup with a computer on Chaklala, i visited there, the guy fixed the car, just been to lahore and the total CNG consumed as Rs. 1200 both way on AC and better drive, he charged me 4000. The exact location is opposite Fauji Plaza (next to sir syed chowk), the guy name is Javed. should visit him first before even thinking of any engine work.
