Loss of power Part 2

[Konstantin Bogach]

If you owned the car before it lost power then it is irrelevant. If you didn't then...  I bought a car
when I had little clue in cars in general and in turbo cars particularly.
Then I fugured out that what it has is not what it should be. $40K car just could not run like this.
After learning I checked all systems and everything was Ok. Finally, I found that turbo vanes were bent,
probably, after compressor nut fell off.  It made 1.4 bar but very slow.

Konstantin Bogach.

>
>
> Message: 4
> From: "Fred Munro" <munrof at sympatico.ca>
> To: <BBBurban at aol.com>, <jimk at spotgraphicsinc.com>,
>         <quattro at audifans.com>, <s-car-list at yahoogroups.com>
> Subject: Re: Loss of power Part 2
> Date: Fri, 22 Feb 2002 20:41:13 -0500
>
> You can't really tell what's going on by listening for turbo spool. Splice a
> line into the vacuum/boost line to the ECU and run it to a pressure gauge
> fastened to the drivers side windshield wiper so you can see the gauge
> through the windshield.
> Warm the car up, drive it at 60 kph (38 mph) in 4th and floor it. Read the
> boost at 3000 rpm. At altitudes under 5500 feet, depending on outside
> temperature, you should see a boost pressure of 1.8 - 2 bar (11.8 - 14.7
> psig) at 3000 rpm.
> If the boost is substantially less, you have a problem with the turbo system
> somewhere.
>
> Fred Munro
> '94 S4
>
>
> From: <BBBurban at aol.com>
>
> > Well all,
> >
> >         Thanks for the info on the line to the ECU but that wasn't it.  We
> > checked it at all ends and they are still connected securely.  I should
> have
> > mentioned this is a un modified car except for suspension and wheels.
> While
> > testing the car again today in a valley we did hear some turbo spool with
> the
> > windows down and the sound   bouncing back at us off the steep banks at
> the
> > sides of the road.  So what I have deduced so far is the turbo is
> spinning,
> > the by pass valve is new, and the line to the ECU is connected.  The
> engine
> > still runs smoothly, just seems to have lost that UMMMPH that it had.
> Does
> > anyone have a suggestion where I should look next?  I am at a total loss.
> >
> > Thanks all
> >
> > Matt ( via Hank's email)
>