"how to drive vitz in Muree?"
with one leg folded like the rickshaw driver
on the serious note
the guy has a problem going uphilll not downhill if u read the topic
1) go uphill on petrol not cng
2) remove any air blockages done for cng
3)mixing a bit hi octane might help
4)dont over load such a small auto car transmission might damage with gear hunting
5)keep ur car tunned and set on petrol