Re: [TECH] high idle again

["MrAudi" <mraudi25@epix.net>]

could it be true? could someone else really have the same damn annoying as
hell problem? I too would greatly appresciate any insight into this problem


----- Original Message -----
From: "Michael Abatzis" <abatzis2@hotmail.com>
To: <scirocco-l@scirocco.org>
Sent: Wednesday, December 12, 2001 4:31 PM
Subject: [TECH] high idle again


> when i firt dropped in the 2l 16v, i had problems with a high idle, which
> mysteriously went away. the weather turned cool, and it came back after 2
> months of good behavior:
>
> usually around 2k rpm. if i drive for a while or rev it in neutral for ~30
> sec, it will sometimes find a new baseline between 1 and 2k. whereever it
> decides to be, it's stable. no fluctuation, revving briefly has no effect.
> occasionally if it decides to idle correctly, rpms will fall almost to
stall
> before settling at 900, but no hunting. a/c on/off no effect. i've
replaced
> vaccuum hoses, tested isv per bentley and cleaned. all grounds were
> cleaned/replaced during swap. tb sprayed generously w/ carb cleaner.
timing
> set. o2 sensor working. idle set to correct duty cycle value; closing
bypass
> screw has little if any effect.
> stuff it could be?:
> idle switch? don't remember if i tested it or not...
> bad ground? there's a braided ground wire from the back of the intake
> manifold that broke off from somewhere. don't know where. i have other
> manifold to body grounds, but...
> isv? tested/cleaned it, but if i pinch the hose to intake boot, rpms fall.
>
> driving me nuts. any help appreciated.
>
> -michael
> 88 2l 16v scirocco
>
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