Audi 5KTQ low boost pressure

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <199708111213.IAA02051@lemur.dpspps.kodak.com> kavanagh@kodak.com (David Kavanagh staff) writes:

>   If your car idles so well, it seems unlikely the leak is in the intake.
> The whistle make me think there must be some kind of leak in the intake
> however. Does it only make that sound when you put your foot in it?
> I think tracking down the source of the whistle could be key. Here is
> an idea. Get a friend to help. Move your car right up next to a
> sturdy brick wall, or building (front bumper just touching the wall).
> open the hood and have your friend start the car and put it in gear.
> Now, this will be hell on the clutch, so don't do it any more than
> you have to, but engage the clutch so the car is pushing ahead and
> the engine is being loaded. This will cause the turbo to try and create
> boost. Now, listen very carefully to where the whistle is coming from.

I'm not that keen about this procedure.  A healthy 5k will easily push over a 
single brick thickness wall, and perhaps a double one.  I'd hate to see someone 
choose a wall with someone the other side of it.

Turbos whistle.  Fact of life.  Some more than others.  Whistling per se is not 
a problem.  The symptoms sound to me more like high end fuel starvation, and 
I'd start with a simple no-load fuel pump flow test.  Just disconnect the fuel 
feed line, put it in a bucket and run the fuel pump.  Look for 900cc/30 seconds.
 
-- 
 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club