...my audi hates me...

[Benjamin Weste Pearre]

Please give me ideas - I'm at a loss now.

A hot day...  Another problem.  Is this a clue to the intermittent low
boost?  Or has my poor gimp finally decided life is not worth living?

I decided that since the air temperature sensor (the one next to the
throttle switch) was the most grime-covered of all the sensors, I
should look there first for intermittent connections.  When I
disconnected the wires, one of the terminals released a bunch of black
goo.  Don't know what that was, don't want to know.  I suspected that
the connection there was pretty damned intermittent, also since the
two male spade connectors that are supposed to make the connection
were held together with nothing more than OEM-looking shrinkwrap!

A few trips to Radio Shack later and I have quick-connects soldered
and crimped onto the sensor wires.  I no longer doubt that connection.
However, it doesn't seem to help anything (I'm reading the right
resistance...)

Enter the New Problem!

Now, I get 1.0 bar boost, until about 4500 rpm.  Then, it starts
climbing to 1.1 and 1.2, and then the car starts stumbling.  I can
keep it floored and I'll get some acceleration and then a severe
hiccup and then more acceleration and then another hiccup.  These are
on the order of (very roughly) one per second.  The boost gauge sits,
happily oblivious, at 1.2 throughout.

Also, I don't know if this is new, but when I do a wot run, when I get
1.2 bar boost and let off the throttle, I hear a sound like air brakes
being released.  I haven't driven with windows open next to a concrete
divider (sound reflector) for a while, but I don't remember ever
hearing this before.  Is it supposed to do that?

Is there any way that this could be related to my messing with the air
temp sensor?  I had never noticed this problem before, but I thought I
re-did everything I had undone, and don't see how I could have caused
this.  But the timing is suggestive.

Still no fault codes.  Grrrrrrr.

Again, sincere thanks for any suggestions.

-Ben

--
Ben Pearre          1990 200TQA          http://hebb.mit.edu/~ben