OT: Jetta idle

[climber168 at gmail.com (Jesse)]

I think i can actually be helpful on this.  My cabriolet did this exact
thing a couple months ago and it turned out being a vacuum leak. But it got
so bad that it actually did stall. Annoying as hell.  The sad part is, i
didnt get to fix it.  My dad was convinced that we needed to replace an oil
seal and we ended up screwing up the timing so we took it to a shop to have
it fixed and timed.  They found a vacuum leak and since then, it hasnt done
the stupid idle thing and the best part: it feels more powerful!
 - Jesse

On 12/21/06, Greg Pallett <greg.rocco@gmail.com> wrote:
>
> A funny thing has been happening with my Jetta lately.  When the rpm's
> drop from to idle, they drop pretty low - to maybe 500 or so.  The car
> shudders and you think it's gonna stall, but then it corrects and goes
> back to idle at 900ish.  It happens when the car is warm, when I come
> to a stop.  It dosen't happen when shifting, there's not enough time
> for the rpms to drop to idle.  Sometimes sitting at long red lights it
> will just go from it's 900ish idle, stumble to 500, and then pick back
> up.
> Any idea where to start troubleshooting this?  I'm tempted to blame
> the ISV, that seems to be a common culprit in mk2 Jettas...
> Thanks!
> GP
>
> --
> "Fatal mistakes rarely happen, but funny things often do"
>
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