Hi Fyq
its nice to C dat this thread is still alive 
i ve altis 07, 100,000 km done , with landirenzo + lambda sensor equipment, installed by al-mubarik ISB
1- when i swith to CNG from petrol, rpm falls in idle state initially but after 15-20 mint drive it goes off. how to rectify this ?
2- untill 90,000 kms, every thing was perfect, but after that there appeared a missing both on petrol and CNG, i got the " tappets " adjusted from Toyota Capital, and after that car dsnt goes beyond 180 km/h......what could b the reason
thanx fr ur kind reply 