My 2006 cultus giving on average 110KM/Tank (50KG) for the past two months. Previously it was giving me atleast 170KM/Tank. I have done serive of my CNG kit and cylinder and had a visit to two or three different mechanics but of no use. Everyone is saying that there is no problem with CNG kit or no leakage found. I have checked the clutch, pressure plate, spark plugs, plug wiresa nd coils all are fine.
Please help me in finding the problem and suggest me from where should i start to daignose the problem and solve it.