The results (WAS: Differential Pressure Regulator Checking

[Tigran Varosyan]

Yes, the car is a 4ksq.

Air Flow sensor?! The mechanical plate assembly that makes the plunger go up
and down? That cant be right! The plunger stiffness is most definitely due
to pressure lock. I have tested that again and again. Can someone jump in
here and clear this up for me?

Full description of plunger stiffness:
When plunger becomes stiff the air sensor plate will go freely up about 2mm
after which it becomes VERY hard. When forced up, from below, there is
constant pressure to push the plate down. If I raise the plate and let it
go, it will go down to it's lowest position. When pressure is released from
the system, the air plate moves very easily.

Thanks for the suggestion, I just do not understand how this could be an air
sensor plate problem... Can anyone elaborate?

Tyson



-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of GMBCHEF at aol.com
Sent: Thursday, November 28, 2002 4:35 PM
To: human747 at attbi.com; rob3 at hod3.fsnet.co.uk
Cc: quattro at audifans.com; tigran at tigran.com
Subject: Re: The results (WAS: Differential Pressure Regulator Checking


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[ Picked text/plain from multipart/alternative ]
I'm reading the Bentley. As I remember, car is and 85 4kq, correct? He's
saying now that the air sensor plate is moving with difficulty upward,
correct?

 Bentley says:
  Operate starter for 10 seconds ( to pressurize system).
  Lift plate with a magnet or pliers. An even resistance must be felt
throuhout entire range of travel. If plate is moved quickly from raised
position to rest position, no resistance must be felt. Otherwise, replace
air
flow sensor.
  If plate is hard to move upward, but moves freely downward, control
plunger
is sticking : Replace fuel distributor.