Re: fuel delivery- please help

["Ewan Hopkins" <ewanhopkins@hotmail.com>]

There's a few things it could be, assuming the problem is with fuel 
delivery:
You have 2 pumps, one in the tank which is a delivery pump for the main 
one, and the main one located under the driver's side floor, just in 
front of the rear axle.  If the in-tank pump is dud or the filter mesh 
on the pump is clogged, the main pump won't be getting enough fuel. 

If the main pump itself is failing then it will be quite noisy - a 
buzzing noise which often fluctuates a lot towards the end and gets 
worse once its been running a while.

Bad earthing or faulty connection to the pump(s) will also cause 
problems.
The contacts on the fuel pump relay  can burn-out, giving poor supply.
Check the voltage at the terminals on the pump.

I had a similar problem in that the car would die if I was sitting in 
traffice queues longer than 5 minutes or would occasionally run rough.  
I put in a new main pump and a secondhand lifter pump and it cured it.  
The mesh filter in the tank was pretty clogged so it could have killed 
the main pump over time - the problem did get progressively worse.

Access to the in-tank pump is under the rear seat: there's a round hatch 
with 3 screws, under which is a round plate with pipes/wires attached.  
The round plate locks in to the top of the tank: use a blunt screwdriver 
to tap it round in either direction until it comes loose.  When 
replacing the cover put a little petroleum jelly on the rubber seal to 
stop it being stretched & broken when you re-lock the plate.

The fuel pump relay has '2' marked on the cover of the relay and I think 
is in the top row third socket from the left on the fusebox under the 
glovebox

HTH,


Ewan Hopkins...

'85 Storm 2.0
'86 GT 1.8



>From: Jon Cope <jdcope@aracnet.com>
>To: scirocco group <scirocco-l@scirocco.org>
>Subject: fuel delivery- please help
>Date: Sun, 14 Mar 1999 10:42:30 -0800
>
>Hi guys, I am new to this group, to H2O VWs actually.
>
>Car: 1985 Scirocco.
>I am having a fuel delivery problem. Every once in a while, the car
>starts bucking like a novice clutch user is driving.
>If I try the gas pedal, there is no response, then, most of the time, 
it
>
>starts going again.
>I have also noticed that the fuel pump is making odd noises too. It
>sounds like it is missing or something. Could this be the fuel pump
>relay?
>A friend of mine told me a GTI he used to have had this problem, and it
>was the relay.
>Which relay is the fuel pump relay?
>Also, I was told that there are two fuel pumps on my car. Could one of
>these be going out?
>Where are they located? I know I need to get a Bentley, but I can't
>afford one right now.
>Please help...
>
>Jon
>
>
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