Guys, I have a 2007 Liana - 1.6 Eminent (Automatic). This car was not sold with factory fitted CNG. However, the person who used this car before me installed after-market CNG in it, and I think it's kind of killed the engine.
I'm getting a mileage of 7km/litre in this car. After filling up 30litres of petrol, I travel 170km before the petrol light turns on. I do however end up driving it till it reaches ~210km, so that's barely 7km/litre.
I must have driven around 500km on CNG in the past 2 years, and 0km over the last 12 months. Can someone help me out as to what the problem could be? I don't think a 1.6liter car should give me such low mileage.. I've had the engine oil, air filter etc. changed regularly, and I drive sensibly (keeping RPM below 2500 75% of the time), and don't use the AC too much either. Could someone help me out with this? I can't seem to figure out what the problem is!
Secondly, is it advisable to take the CNG tank out of the car without uninstalling the CNG kit? The 55kg cylinder in the trunk makes the car heavy and slow, so I wanted to take the cylinder out. Just wondering - would there be any danger in doing so? And would it be easy to place it back in if I wanted to?
Lastly, the car's brakes make a screeching sound every time I brake. It has ABS, and lately, the brakes haven't been performing as well as they used to. What am I supposed to do about this? The braking sound ends up giving me a headache most of the time :S