IF noise is FP cavitation, my understanding is that it happens at
*suction* side of pump. (Tank outlet ID too small+pre pump filter,
clogs, and/or (IMO), some kind of design change between the OEM tank
and a lesser $ after market tank)

FP noise could also be a wearing out, or worn out, pump.

Davids comment about the resistor rang a bell with me. Check the large
cavitation thread over on The Samba. Maybe this info is in the Vanagon
archives too.

Neil.

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines

On Sun, Jun 28, 2009 at 6:33 AM, Dave Arthur<dave.arthur@nscc.ca> wrote:
> So, is it fair to say that a noisy FP may be caused by the pump delivering
> too much volume? Does the list have any advice on what resistance to use or
> what wattage has been used to 'slow' down the pump?
>
> Thanks
>
> D
>
>
> On 27/06/09 5:49 PM, "David Beierl" <dbeierl@ATTGLOBAL.NET> wrote:

>>
>> So...*if* the pump has excess output beyond the specified minimum of
>> 1l/min, one way to help the situation would be a small series
>> resistance in the pump +12v lead, to slow it down and bring its
>> output down to the minimum.