the car in question is baleno 99
driven on petrol and cng..
1300 CC efi
G13 B
a strange problem in car petrol tank is bothering me..
well here is a brief history..
my car was missing a lot on petrol abt 5 months ago. i changed its filter but in vain.. I then again changed the filter and cleaned the car petrol tank from AA ( fraudi workshop) only to see the problem recur after few days. so abt 3 months ago again changed the filter and fuel tank cleaning and this time the car was performing OK.
after driving my car on petrol even for a short while while i open the fuel tank cap a strong hssssss sound of air comes from fuel tank due to pressure in fuel tank..
Also when i try to fill petrol inside my car fuel tank the automatic shut off mechanisun from the petrol dispenser in petrol pump immediately shuts off petrol to my car ie if i try to fill 1000 Rs petrol to car petrol tank the automatic mechanism when they write 1000 Rs on dispensers fill only abt 100-150 Rs of petrol and then the petrol stops the operator literally has to press the petrol dispenser clutch all the time if he has to fill in that 1000 Rs petrol in tank..
My Assumption: there is a very strong fuel pressure inside my fuel tank that is not allowing easy pouring of petrol into it..
what to do next??
plz advise..