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Petrol Leaking From Bottom Of Car (r33)

Detour

By Detour,
in General Maintenance

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Detour Explorer

Detour

Posted
Posted

Hey guys

I was filling up my car to full today and i realised beneath me there was petrol. I looked under my car and it was leaking fuel by the time i filled up i would lost an easy litre and there is a smell of petrol fumes which my mechanic had stated it was coming from the boot where the fuel tank is. At the moment i get approx 250 km per full tank but at first i thought it was linked to my transmission not kicking into overdrive when driving at 100km. what is wrong with my car?????

pls help

thanks in advance

blind_elk Grand Master

blind_elk

Posted
Posted

Does your car have an aftermarket fuel pump? It may be that the O-ring that seals the fuel pump panel is perished or mis-aligned.

Check the restrictor neck (where you fill) has been installed correctly. It should be "sandwiched" between the body and the fitting that takes the fuel cap.

Detour Explorer

Detour

Posted
  • Author
Posted

Thanks for your help guys

No it is not leaking from the boot it was leaking underneath the car. I also checked the boot when i saw it leaking and it wasnt leaking from the boot next to the battery. I drove home and checked if it was leaking but it stopped.

Also, the guy i had bought the car from had an aftermarket fuel tank or surge tank or whatever it is but he removed it from the car so i was thinking he didnt remove it correctly thats y it is leaking?

Beer Baron Grand Master

Beer Baron

Posted
Posted

are you sure it wasn't just the little overflow from being overfilledd? the filler neck has an overflow thing in it and this dumps the fuel out under the car.

JamesK Experienced

JamesK

Posted
Posted

Beer baron yea but even if he did over fill he shouldn't be getting 250 per tank thats shocking, I get 300 and I know somethings wrong, replacing the O2 sensor hopefully it's that

Detour do you notice fuel on the ground when you park? or less fuel in your tank *keep in mind the fuel gauge reading is altered by the temp outside and the engine*

Japanese dino Rookie

Japanese dino

Posted
Posted

Hi,

I had a similar problem. It turned out that the seal on top of the fuel tank was leaking, but only when you the tank was filled to the full mark. A small amount would leak over the top of the tank down the sides and then directly underneath the car.

Remove the inspection plate located in the boot. This will reveal the access to the top of the tank and fuel pump. Go to your local servo and fill up your tank till it's full. Keep an eye out on the top of the tank and if you notice fuel pouring out of the top (trust me you will notice it) then its a good chance that it's the seal. It would also be a good idea to check all the fuel hoses going to and from the tank and check for wear or cracks.

Hope this helps

Regards

Hey guys

I was filling up my car to full today and i realised beneath me there was petrol. I looked under my car and it was leaking fuel by the time i filled up i would lost an easy litre and there is a smell of petrol fumes which my mechanic had stated it was coming from the boot where the fuel tank is. At the moment i get approx 250 km per full tank but at first i thought it was linked to my transmission not kicking into overdrive when driving at 100km. what is wrong with my car?????

pls help

thanks in advance

jarrod83 Community Regular

jarrod83

Posted
Posted

can i ask does the rear of ur car always have a fuel sorta smell.. cause im having a similar problem.. when i fill it up it overflows.. and it always a fuel sorta smell to the rear of the car n also get terrible fuel mileage.. usually around 250kms/tank

anyway im going to have a look at some of the suggestions tomorrow and see if i can fix the problem

Shadz Collaborator

Shadz

Posted
Posted

I had a similiar problem on my R33. It was the hose coming from the fuel pump to the connector under the car. It was split in the middle, so the only way I picked it up was by having someone look in the access panel in the boot with a torch, and then I was turning on the ignition to prime the fuel pump. Because it was wet under the car while it was off, but you could only see the leak when the car was on.

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