Re: Issues rough idle, plus on 93 100csq Avant

["Fred Munro" <munrof@isys.ca>]

Hi Kenneth;

   What year and model Audi do you have?
     Foam in the coolant overflow tank can be indicative of a bad head
gasket/cracked block - anything that would leak combustion gases into the
coolant. A bad head gasket would also give you a rough idle. Incompatible
coolants could foam, but I think they usually sludge. Foam requires gas
mixed with liquid. No stock Audi engine in good condition and tune should
shimmy like a 3/4 cam 327!
    Pull the codes to check for the cause of the "check engine" light. You
may have other problems besides a loose gas cap - this may shed some light
on your rough idle problem.

HTH

Fred Munro
'91 200q  272k km

----- Original Message -----
From: KENNETH SINKLER <KSINKLER@americanbible.org>
To: <quattro@coimbra.ans.net>
Sent: Friday, April 09, 1999 10:37 AM
Subject: Issues rough idle, plus on 93 100csq Avant


> I am a new guy on the block but will have to go to the digest Email format
> I love the
>  information but 120 plus messages a day is too much for me to handle!
>
> I have 6,000 miles on OEM warrentee and want to resolve a few problems,
> while I can.
> I got it in 1997 with 60k miles on it ( now has 90k).  It had a rough idle
> from the beginning.
> I asked the dealer to explore and they said it is normal.  This engine
> idles a little better
> than my old 62 327ci vette with a 3/4 cam. It really has a noticeable
> shimmy, at stand still,
> ( I really don't like the Trany setup that requires you to floor it to get
> pick-up).  I recently
> replaced the plugs ( Bosh split fire type plugs) I think the Distr. Cap &
> Wires look OK.
>
> They also said the intermittent check engine warning lite has to do with
> the gas cap being
> loose and to disregard.  I have disregarded  it but it seems dangerous
> because how would
> I know if something goes wrong that really needs attention.
>
> Finally, it puked its water pump a year ago and they warrentee repaired it
> but I now noticed
> a foam type substance in the overflow tank ( incompatible coolant mixed?)
> but the gauges
> and physical look see indicate it is running  as it should.
>
> I am currently implanting a used 5ks motor in my 200,000 mi. 87 5ks Avant,
> have owned
> 85 5kt my 1st love, & an 86 5ks. my current stable also includes 2 MGB's,
2
> Rover SD1's,
> 77 460 Linc town coup, tow car, a 88 Cady Coup D and a 76 F250 pick-up. A
> bit eclectic.
> .
>
>