Hello Pakwheelers,
From few days I am asking people on PW about this CNG issue. It started a month ago when I start A.C the RPM starts fluctuating and suddenly the engine is closed. I went to different mechanics of CNG, Engine, 3S, Wiring, Electrician and even showed car to many many people. Everyone says it has no problem. I usually drive at low RPM. Now what happened today After coming back from 3S got it laptop checked everything is fine. The car starts missing. My family was sitting in car and that piece of junk did not even wanted to move :. It was missing heavily on CNG and Petrol both then after 5 minutes I called my driver and he opened the Bonnet and said start it he pulled the race wire for a while and then It started but again It started missing on CNG so I had to switch it to Petrol. My car was tuned 1000 km before from a good mechanic who tune my cars from 9 years (almost) Spark Plugs are also new. Radiator is new 2 channel (Thailand), CND advancer throttel body injectors lambda everything is fine confirmed by three laptop equipped service centers. Please help me Regarding this issue i am too much in trouble now :@ Feels like kicking the car out now. One more thing The car gives very poor mileage on CNG. The car runs smooth on Petrol (mostly) only caused problem today. Car water is to the full mark in bottel and full in the radiator. Engine oil is Havoline Petrol changed it at every 3k. RPM does not drop when fan + CD player + amp + speaker is turned on it only causes problem when A.C is turned on. It also gives very poor mileage. Please help