Stiff Plunger in Fuel Distributor

[Tigran Varosyan]

You and me both. But at this point I just want a car that goes *Vrooommmm!*
when I push the gas pedal. Is that too much to ask? :)

Tyson



-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of Jesse A Clendenning
Sent: Tuesday, November 26, 2002 2:58 PM
To: quattro at audifans.com
Subject: Stiff Plunger in Fuel Distributor




--
[ Picked text/plain from multipart/alternative ]

As I am still at work and do not have this problem - as of yet, I was
thinking... I've read a couple of posts about stiff control plungers in the
fuel distributor and have experienced it once myself on an old 5000s. Most
people assume that it is a result of the fuel pump running in an
"overpressurization mode." After thinking about this I believe that maybe
this could be just the opposite. The difference between the pressure on top
of the distributor and on the bottom of the distributor are what causes the
pressure on the plunger, correct? If there was excessive pressure on the
bottom of the fuel distributor, wouldn't the plunger be easier to lift? Now
if the pressure were low from a failing fuel pump - then pressure would be
as high as possible on the top side of the fuel distributor, and greatly
reduced on bottom side - making a stiff plunger.  In the Bentley it
describes cold control pressure (on top of fuel distributor) as being less
than warm, making the plunger move easier.  Does this seem to coincide with
your theories? or am I flawed in my views? I want to understand this better.
Thanks, Jesse Clendenning

_______________________________________________
Join Excite! - http://www.excite.com
The most personalized portal on the Web!