Re: transfer pump question

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

Sounds very much like the sort of problems I used to have. It will be 
either the lifter pump isn't working or the strainer on the bottom of 
the pump is clogged.  The strainer is on the end of the lift tube, which 
is basically an extension of the bottom of the lifter pump.  I ended-up 
replacing my main pump with a new one and fitting a secondhand lifter 
assembly.  I didn't bother testing my old pump but the strainer was 
pretty clogged.

I would try cleaning the strainer, then getting a secondhand lifter 
before replacing the main pump.

You could check to see if the lifter pump is working by taking off the 
cover from the tank access point under the back seat.  You should see 2 
fuel lines & a 2-pin connector.  With the car running you should be able 
to feel if there is any vibration from the lifter pump as it is part of 
the lifter assembly which is attached to the round plate with the 
pipes/wires.  If in doubt, pull the 2-pin connector while the car is 
running and see if there is any difference.

To remove the pump/lifter assembly you need to unlock the plate:  it is 
just a twist-lock - use a blunt screwdriver to tap round the plate maybe 
1/4 of a turn and it should come loose.  You are best to disconnect the 
hoses & wires first.  The whole lot should then lift out.  
The strainer should pop off the bottom of the assembly.  You should also 
be able to see if there is much debris floating in the tank. If there is 
a lot then get the tank filler neck checked as they are bad for rust.

TIP: when refitting the pump/lifter assembly you should lubricate the 
rubber seal first as it tends to stretch & break if you don't.  If it 
does break you'll get strong petrol fumes in the cabin & leakage from 
the tank when it is much more than 1/2 full.

HTH,

Ewan Hopkins...

'85 Storm 2.0
'86 GT 1.8


>From: "Dr. Tracy Allan Shahan" <shahan@mail.med.upenn.edu>
>To: scirocco-L@scirocco.org
>Subject: transfer pump question
>Date: Tue, 16 Mar 1999 11:03:55 -0500
>
>I have been having load hesitation (mostly going up hills) with my 85 
roc.
>I have replaced many things but to no avail.  I finally correlated the
>hesitation problem with low fuel (below ½ tank).  I recently noticed 
that
>when the hesitation begins it is intermittent and when the fuel gets 
lower
>it is not a load hesitation problem because it starts hesitating while
>under no load.  I also noticed that during this time that the fuel pump
>starts making noises like it is getting no fuel, but there is a little 
more
>than ¼ tank and when I fill the tank up the problem goes away.  It 
sound
>like the lift pipe or tube from the transfer pump is broken.  Could
>someone, who has had the transfer pump out of their Roc, please 
describe to
>me what the lift tube looks like so I can decide whether I need a new
>transfer pump or simply a new lift tube.  I remember a string maybe 2-3
>years ago when someone had the same problem but could not find it in my
>achieve.  Any help would be appreciated.
>
>Thanks 
>
>Tracy Shahan   
>
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