[s-cars] Problem SQ/KW

[Joern Amundsen]

Colin!
The boost on the SQ is solely controlled by wastegate spring stiffness.
There are no frequency valve on this system with the LH-Jetronic. If you are
refering to the boost-gauge inside the instrument panel this is electric
controlled by the ECU and is very inaccurate. The stock max boost on the SQ
is 1,05 barg(showing as 2,05 on the gauge) on the European models. I do not
believe the check-engine light is related to low boost, but low boost is a
function of malfunctioning sensors.

I will try tomorrow to disconnect the sensors(air temp,water temp,MAF etc)
on my car and see if I can provoke a similar situation as you have.

Is the US cars equipped with both catalysators and O2 sensor?


Best regards Joern,MTM RS


----- Original Message -----
From: "c cohen" <ccohen5 at compuserve.com>
To: "Audi S Car List" <s-car-list at audifans.com>;
<Audi20V_Kruemmer at yahoogroups.com>; <urq at audifans.com>; "qlist"
<quattro at audifans.com>
Sent: Wednesday, August 27, 2003 10:58 PM
Subject: [s-cars] Problem SQ/KW


> One of the SQ/KW's in the US is experiencing a engine check light problem
> which has not appeared with the other 20 valve I5 engines as far as I can
> tell.
>
> At about .85 bar the check light comes on and its not pulling full (1.7
bar)
> boost.  We have no paperwork that is directly related to this engine so
its
> an experience and trial and error solution.  Let me know if anyone has any
> thoughts.
>
> The car is in LA and if anyone know the owner directly then by all means
> correspond with him but he does not follow the lists.
>
> Thanks for any and all ideas, besides the one I fully expect to hear that
> goes something like...lend it to me for a year and I will figure it
out.!!!
> VBG
>
> Colin
>
>
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