Fuel Pumps

[Louis-Alain Richard]

I had a very long discussion yesterday with a CIS guru, Greg Haymann from
Autofirme in upstate NY. He convinced me to adjust very precisely all the
fuel pressures (control, system) that are critical to cold-start, power and
hot start. So, a generic pump might lead you to play with the fuel pressure
regulator to put it back where it should. Also, the slits in the piston of
the CIS head erodes over time, so there is adjustment to do to compensate
for wear. The pistons are not replaceable, one must buy a complete new head
($$$$$$). 

But still, maybe you can go with the generic, and install an adjustable fuel
pressure regulator inline to fine tune its output. Pump pressure is about 6
bar, 90 psi.

Louis-Alain
 

-----Message d'origine-----
De : quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] De
la part de DK
Envoyé : 10 février 2009 02:58
À : quattro at audifans.com
Objet : Re: Fuel Pumps

Vittorio,
its hard to say when your fuel pump is going to die. My pump was
pretty noisy before it died. The new Bosch replacement pump is just as
noisy.
I would go a head and get the Bosch pump. I try to stay away from
universal products in general, especially in this case as the pump has
to operates at high pressure for the CIS system, not sure how well the
universal pumps are going to work.
Replace both filters, and maybe the rubber mounts while you are working on
it.

Dave
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