[BiturboS4] help diagnosing two problems

[jysap at cs.com]

Since my car is a TIP, I cannot address the second part of your email. With regards to the engine vibration, my Y2k S4 has 40k mi (I leased it new - and will buy out the lease next month)  and I have NEVER EXPERIENCED ENGINE VIBRATION or RPM DROP OF ANY SORT. May I suggest that u get another Audi dealer or aftermkt tuner (I am sure that there are good ones in the SF Bay area) run a diagnostic on your ECU. Just a thought. Also, u should purchase VAG-COM and run your own diagnostics - just to be sure.


"California Fields" <cfields72 at hotmail.com> wrote:

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>
>So, I just bought my (used, 2001, 9k miles) S4 about three weeks ago and I
>think I've identitifed a couple of glitches.  When I am coming to a stop, the
>engine vibrates a little as if it is stalling and then it recovers just as I
>come to a stop.  It happens at all temps and I notice that the tachometer
>falls slightly below the idling rpm during this momentary vibration.  I
>mentioned it to the dealership when I had it in for 10k service and they said
>it was normal - that the fuel injectors were just falling slightly below
>normal idle rpms as they "rebounded" back to the idle levels from when I was
>driving under load.  I thought that was weird because I've never had that in
>other cars.  Do you guys experience this?
>
>The second thing is a little troubling. As I engage the clutch for 1st gear
>from a stop, I feel a sort of slip and bump after the car is moving slightly
>and the clutch is about half way out.  The problem is much more apparent when
>the car is cold.  It's almost like the clutch is slipping and then regrabbing
>during the middle of the first gear start-off. It doesn't happen in any other
>gears.  Any ideas?
>
>Thanks, Carter.
>------------------------------
>Carter Fields - San Francisco
>'01 santorin blue
>stock (not for long!)
>
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