[V6-12v] Hesitation at first start

Tom Christiansen tomchr at ee.washington.edu
Thu Jul 29 18:59:45 EDT 2004


It's only an issue on the first start. I usually don't rush into traffic 
anyway, so it doesn't really bother me too much, although, I'd prefer if it 
wasn't there. Sometimes the car accelerates a bit unevenly which indicates 
to me that the cats are plugging up. I just poll the forum to see if the 
plugged cats could be the cause of this hesitation.


At 03:52 PM 7/29/2004, Lt.Kubosh wrote:
>I had the same problem and it looked like the O2 heating problem. (No DTC
>stored) I had replaced the O2 sensors and the problem dissappeared for some
>time. But now it's back again.
>If you let the engine run on idles for about 1 min. the hesitation doesn't
>I bet on O2 sensors heating, but I don't care on mine.
>-----Original Message-----
>From: v6-12v-bounces at audifans.com [mailto:v6-12v-bounces at audifans.com]On
>Behalf Of Tom Christiansen
>Sent: Tuesday, July 27, 2004 9:08 PM
>To: V6 12V Audi Mailing List
>Subject: [V6-12v] Hesitation at first start
>Sometimes my 1994 90S shows an interesting type of hesitation. It happens
>every now and then. I start the car, and start driving. On the very first
>acceleration (away from the curb) the engine hesitates for a second or so.
>After that it's fine. It only happens on that very first start and that's
>The cats are pretty old and I'm suspecting that they might have started to
>plug up. Does this diagnosis match the symptom described above?

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