h2@shadowrider/h2
Your limited speed is due to poor CNG setting but if vehicle has same issues on Petrol then it can be due to following:
Clutch plate is weak(99% probability)
Engine is weak i.e consumes oil more than 1/2 a quarter in a week driving(within 100km of driving)
Oil/Oil filter of automatic transmission requires replacement or transmission is permanently damaged due to rough usage by non-technical drivers
Get the vehicle checked by a professional mechanic and if its the clutch plate and as per his experience it can last for few more 1000 of kms then get your driving practice completed before replacing as during the learning procedure vehicle mechanical parts suffer lot of stress resulting in their wear and tear before time.
Daewoo has a high engine noise level and sounds like diesel engine as it is has a Throttle Body Injection(TBI) system when vehicle is idle/standing still but if the vehicle creates more sound comparatively to other daewoo`s then it can be due to following:
Direct Radiator Fan(Automatic fan cooling system deactivated)
Worn generator bearings.
A/C Clutch plate dry or worn.
4.Generator/Compressor/Timing belt loose
High noise of vehicle when vehicle is moving:
Wheel bearing`s ,any of the four wheels, worn.
Gear box garari noise due to rough usage.
Front Disc pads worn
Front brake system requires service
Furthermore I will advice you to refrain from fast driving as you are a new driver and your reflexes for emergencies are not that quick as of a professional driver. Also controlling a badly maintained vehicle requires more skill then a excellently maintained vehicle.
