I am facing two problems in my 08 liana with factory fitted Landirenzo Omegas cng kit. I bought this car used a couple of years ago. Its in a good nick altogether but I had to replace the ignition coils soon after that as the car was missing badly on CNG, was better on petrol though. But even after all expense, I am not satisfied with its performance.
The main problem is that whenever i accelerate the car, on CNG from idle, the engine hesitates a bit, but as soon a it crosses 2k rpm it picks up fine and things are even worst when ac is on, On traffic signals i have to accelerate till 2~3k before i release the clutch to get the car into the motion. On petrol its better but I can feel it there too..
Second problem which may be related to the first problem as well is that during normal driving, whenever i lift my foot from the gas pedal and then put it back, it takes a bit of a jerk ("Hauka" in local term) before getting into pace. It can be felt on petrol too but the magnitude of it is lot less then that of CNG.
I have seen many 3S for this problem but none of them have been able to rectify these problems. Most of the time they are interested in replace this replace that, blah blah....
Any help in this regard from your side will be highly appreciated.