serious fuel leak

[johnnycoo1]

guys need your help/wisdome

started the car the other day but it wasn't idling well ......... looked out the window and the garage floor was covered in petrol ! stopped it immediatly , looked underneath and petrol pouring from the bottom of the gearbox.

left it to dry out as i had to run on , then tried it again later ... primed pumps first .... no leaks then started ok and ran fine ..... no sign of leaks anywhere !!! , i have checked all the lines etc all looks fine and dry , this is very scary and i don't want to drive the car again until i can find out what happened ? is this possible it seems very odd that the 'leak' has just disappeared ???

help need to drive my car again but don't even know where to start to diag this one ......

car does not have either fuel pump relay in the main fuse box if thats any use ?

could there have been a pressure spike in the line ?

any help greatly appreciated

cheers

Johnny

 

[turbo jonny]

Surprised someone like Nathen hasnt replied yet.You could try posting on Rennlist which is bigger and
more techie and usually has someone who can help.

 

[SEE YA]

First for me as well could be at a guess fuel lines.

 

[johnnycoo1]

yeah this is a nightmare to scared to take the car out in case of fire but no sign of a leak ! don't even know where to start []

anyone know if one fuel pump goes off line if this can cause a pressure increase ? ie over 4 bar ?

 

[nathan 1981 930 G50]

I'm here! Hehehe []

Well, this is strange, not heard of this one before.

However, I do have a guess. I'm wondering if it could be the WUR. I just can't think of any other fuel component that has a moving part that could leak.
If the car is stock as the factory left it then if fuel got on the floor and it was the WUR then the air filter would have been wet. There is a pipe/hose that is just a vent on the WUR and this hose just connects on to the air filter assy.

The other possibility is that the second time you ran the car and it didn't leak is that your front fuel pump didn't run and you have a leak between the two fuel pumps. So, when you ran the car with only the rear pump working the leak would have been under vacuum. I think this is very very unlikely although possible.

To answer your question about a pump failing it shouldn't cause a leak if everything else is in good order.

 

[johnnycoo1]

found it ! looks like a fuel line at the front of engine to left side fuel rail had a bad connection ! was a good earls fitting but looks like it wasn't put on right years ago , car is EFI conversion btw no WUR etc , stripped out all hoses last night so gonna replace them all this weekend to be safe []