I have Vitz 2002 Automatic installed with CNG and almost drive 90K kilometers.
The car struggles to go beyond 90 KM/h and the pick drops right after any shift (it stays good if I accelerate it badly). Can someone please suggest me what should I be doing, changing plugs to 4 pins etc etc?
I have already gone for a tunning but that didn't help at all. Also I have noticed the same behavior on Petrol but it is not as bad as it is on CNG.