Fuel Return

[Bart GTI-R]

Hi

My R has had some trouble when i try to boot it, and when i try and blow down the fuel return pipe my head nearly explodes.

I tried lookin underneath but not sure which one is the return because it looks like there are 2 - 3 pipes running back, could anyone tell me whats what it would be a great help,

Cheers

 

[Dooie Pop Pop]

the pipe attatched to the fuel filter should go to the fuel rail and the one with the red band (if its still there) is the return

 

[Bart GTI-R]

The ones underneath vehicle are what i cant follow, they are protected by a cover then they go to the petrol tank.

 

[MarkTurbo]

What are you trying to do :?:

If you look at all the connections on top the tank the flow/return fuel lines are indicated by an arrow, its pretty obvious which ones which

 

[Dooie Pop Pop]

you sure fuelings the problem?

 

[Bart GTI-R]

When the petrol tank is nearly empty, the car goes like a rocket, if i fill it to half way and drive about 8miles it lacks performance and when i take the petrol cap off a get a lot of pressure releasing.

 

[zia]

ahh case of my car worn,t go faster syndrome!!! :lol:

zia

 

[sypher]

pressure release or just moving air noise "shssssss" if definatally pressure i'm unsure, otherwise check tank breather as when pump pulls fuel from tank to rail it may be causing a vacum in the tank. when opening the cap does it drive better again????

get a pressure gauge and test both supply and return lines as if there is a blockage in the return line you will also pressure there (just like the reg' creates or you crimp / sqeeze)

how is the O2 probe signalling when good and then bad???

things to check.....

 

[Fast Guy]

After you've release the cap, does the car go fast again or still go slow?

 

[Fast Guy]

You could always try disconnecting the hoses at both ends and try blowing through it. Unless there's something in it, you should be able to this way :?

 

[Bart GTI-R]

Thanks Sypher and Fast Guy, I will check the pipes over the bank holiday, and it is a pressure noise as if a vacuum has been created in the tank, sometimes it runs better once iv taken the petrol cap off but not all the time, thats why it puzzled me.

I havnt checked the 02 sensor, I will check that too,

will let you know how i get on over the weekend.

Cheers for your help

 

[AJ4]

I wouldn't be suprised if you can't blow through the pipe if it has petrol in it, think of the effort it takes to blow a straw full of fizzy coke into someones ear and multiply it by the length and diameter of the full fuel pipe

 

[Bart GTI-R]

Well i dont know what it was but the car has had a bit off stick the last week and its running loads better, o well cheers anyway guys.

 

[Fast Guy]

Maybe your plugs or O2 sensor are fouling up and thrashing it abit cleaned them up. :?: