I have recently bought a vitz 99 model. Initially the pick of the car was good on both petrol and CNG, but suddenly the performance has dropped on CNG as well as on Petrol. The car wont climb even on a slightly inclined road and loses its power. I have got the Tappets checked, i have got the plugs checked and they are OK.
Sometimes when the car is converted to CNG while in standing position and i try to accelerate it it just dies and wont move forward. But once i turn it to petrol and convert it to CNG in running position it runs fine, but as soon as i slow down the car, and i try to accelerate it again it gives up. What can be the problem? Should i go for computerised tuning. I have Garrage Masters behing the Firbrigade are good for Computerised tuning. Can anyone share his experience please. What do they charge for complete tuning?