Jetta idle

[amalventano1 at tds.net (Allyn)]

Idle speed adjust screw could be set too low.
DPR could be out of adjustment / sticking.
ISV could be intermittently sticking at the closed end of the cycle.

HTH
Al 

> -----Original Message-----
> From: Greg Pallett [mailto:greg.rocco@gmail.com] 
> Sent: Thursday, December 21, 2006 9:13 AM
> To: Scirocco list
> Subject: OT: Jetta idle
> 
> 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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