Surging Issue... at idle and when driving. arghh.

[Andrew Dickinson]

It almost sounds like a dying fuel pump too.

One strange thing with this car is that the dash always shows a pressure
of 0.4bar vac.

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
On Behalf Of Huw Powell
Sent: March 17, 2009 3:57 PM
To: Hayes Myers
Cc: quattro at audifans.com
Subject: Re: Surging Issue... at idle and when driving. arghh.



Hayes Myers wrote:
> Was having some cold starting issues (wouldn't hold idle and would
stall
> sometimes).   Put in replacement ISV and all was well again... been
just
> over a week since putting isv in .   Just now car started to 'surge'.
it
> will idle up and down rapidly at the lights... and will surge even
> driving... up/down up/down.  WHen you upshift the revs were not
dropping
> recently (ie: seemed to be 500rpm too high...revs didn't fall off)...
now
> they actually increase.

If your car has an idle switch, check to make sure it's still working. 
If it isn't (ie, staying "open"), your ECU won't know when to use the 
ISV to make a smooth idle.

Although, this doesn't address the surging while driving...

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/
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