Fuel Tank get empty without using

[Saeed73]

I am Sharing Problem of my Friend's Vitz Motor car.
His Vitz have manual Converter switch for changing Petrol to CNG or CNG to Petrol.
Five days ago , He refueled Rs.1350/- Petrol in motor car.Fuel Gauge Pin shows in middle.He did not derived on Petrol afterward of refueling.
Yesterday when he changed over to Petrol, Fuel gauge shows at End Up.
He checked his motor car from Mechanic, He was checked phyisically all fuel Leads, Fuel tank as well as Petrol Fitter.
Also Fuel Tank cap are ok with its rubber seal.He said there is not sign of leakage.
Moreover, there is no spot of petrol dropping on floor where he parked his motor-car in over-night.No chance of Fuel Robbie as well.
Mistry Question is that then how petrol was dry from fuel tank.

[Ocean]

Same thing happen to my Baleno 1.6Gti
pleas check the reverse pipe that is coming from fuel intake to ur fuel tank,
how to chek, refuel ur car go to mechanic and ask him to remove that pipe from engine bay and u will see petrol coming through that back pipe from fuel tank.
ask ur mechanic to fix it and problem will be solved

[afarooqi]

check for leaks as well.

[cvanesk]

may b he didnt convrtd to cng...

[argtr65]

Check the fuel gauge, it may has gone dead due to some reasons.

[Saeed73]

Check the fuel gauge, it may has gone dead due to some reasons.

Fuel Gaugae are Okey , no Fault in It. as well all lead and lines are Ok, not leakage over there.If Petrol Leakage then there a certain spot of it no the floor.
He Driven on CNG all the time, Never try to used single drop of Oil.

Is it possible Petrol and CNG Burn at the same time in Engine ?

[shaheen69]

i knw wat happened,
his KID BRO or SON, is in the car USINNG petrol for piks and LOCKINGS
and dont tell BROTHEr or FATHER,

coz thats wat i do as well,
dad OLWAYS tell mechanic that there is a PROB

wich is ME ACTUALLY

[islamabadcity]

its not possible in 5 days but most of the cars have missing overflow pipe thats why petrol tank get empty. the other reason is overflow pipe is damaged. petrol evaporates;. change the pipe.

[Proverbial_Slang]

i knw wat happened,
his KID BRO or SON, is in the car USINNG petrol for piks and LOCKINGS
and dont tell BROTHEr or FATHER,

coz thats wat i do as well,
dad OLWAYS tell mechanic that there is a PROB

wich is ME ACTUALLY

LOL ! This seems to be the most plausible explanation.

[Proverbial_Slang]

Same thing happen to my Baleno 1.6Gti
pleas check the reverse pipe that is coming from fuel intake to ur fuel tank,
how to chek, refuel ur car go to mechanic and ask him to remove that pipe from engine bay and u will see petrol coming through that back pipe from fuel tank.
ask ur mechanic to fix it and problem will be solved

Apart from my above post, this could be the second most probable issue.

[Porsche_Maker]

Petrol Evaporated.

[AmmarFaiz]

^ LMAO.. yea if its not leakin someones been taking that thing out on secret cruises.