Fuel pump queston

[green536@hotmail.com (Chris DeLong)]

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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