Fuel pump queston

[amalventano@sc.rr.com (Allyn)]

combination of check valve at outlet of main pump and the accumulator.
if the check valve and the rest of the fuel system is working properly, the
accumulator does effectively nothing.
Al

----- Original Message -----
From: "Rabbit16v" <Rabbit16v@attbi.com>
To: "Scirocco List" <scirocco-l@scirocco.org>
Sent: Friday, December 13, 2002 12:15 AM
Subject: Re: Fuel pump queston


> Isn't this an accumulator problem?  I thought the accumulator maintained
> system pressure so that the car wouldn't have to start up from air the next
> time it was started.  Maybe I'm thinking of something else (a valve or
> something), can't remember everything!
>
> Dave
> ----- Original Message -----
> From: "Chris DeLong" <green536@hotmail.com>
> To: <losinit@usa.net>; <scirocco-l@scirocco.org>
> Sent: Thursday, December 12, 2002 4:37 PM
> Subject: Re: Fuel pump queston
>
>
> > The prepump does not put out enough pressure/volume to run the car.
> However
> > main pumps can still buzz and not pump fuel. I have seen this happen
> before.
> >
> >
> >
> > Chris DeLong
> > ICQ#45030867
> > Seattle, WA USA
> > '80 16V 'Rocco ragtop
> > '91 GLi 2.0 16V
> > '77 Rabbit 16V
> > '80 'Vert (parting out!)
> > '61 17 Window type II
> > '91 Vanagon
> > '78 Rabbit
> > '84 Jetta
> >
> >
> >
> >
> >
> > >From: Cathy Boyko <losinit@usa.net>
> > >To: "Scirocco  List" <scirocco-l@scirocco.org>
> > >Subject: Fuel pump queston
> > >Date: Thu, 12 Dec 2002 18:31:14 -0500
> > >
> > >OKay, a question. My car('87 16V) has been out to have a fuel prime
> problem
> > >cured.
> > >Anyway, the initial symptoms were no fuel at starting until the pump ran
> > >through many cycles. Once there was fuel to it, it'd fire right up and
> run
> > >well, until next time it sat.
> > >So the Bentley suggested either a check valve or accumulator, and both
> were
> > >replaced, but the problem persisted.
> > >Other suggestions were the transfer pump (it's making good pressure
> > >apparently, the car's still not home) and the reservoir, which is also
> > >apparently fine. A leaky injector was another possibility (not sure about
> > >those).
> > >Anyway, he says the main pump is buzzing but not making any pressure
> (it's
> > >pretty old and corroded). Does this fit with the previous symptoms? Would
> > >run
> > >reasonably well on just the transfer pump if the main one was going
> south?
> > >I
> > >did notice a slight variation, like a pulsing, when you'd drive at
> constant
> > >speed, say around 4000 rpm, but nothing too horrible, and it was finally
> > >idling really well (thanks to a few nice listers).
> > >Anyway, feedback is appreciated before I add another new part to this
> car.
> > >Cathy, 1987 16V "the silver headache"
> > >
> > >
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