[s-cars] Rough idle?

[Tony Curran]

The brown rings are residue of the combustion blowing through the body of
the spark plug up form the electrode. Suggest new plugs are in order.
 
Tony
96 S6

-----Original Message-----
From: Alvin Labonite [mailto:alabonite at gmail.com] 
Sent: November-18-11 6:03 PM
To: Tony Curran
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] Rough idle?


I did notice the brown ring on the plugs. What do you mean by blow thru? I
have the OEM plugs that does not require gapping.

I have samcoes all around and metal cross over pipes and metal end tank on
OEM intercooler. 

Check MAF to turbo hose too and no cracks..

I thought about plugs.

Thanks.


On Fri, Nov 18, 2011 at 2:46 PM, Tony Curran <tony.curran at sympatico.ca>
wrote:



Spark plugs? If there is a brown ring on the white ceramic material which
suggests blow thru. May need gapping. Michelin man hose. Turbo to x-over
pipe hose. Plastic x-over pipe distorting. Maf to turbo hose. Intercooler
with plastic inlet/outlet may leak.

I've done all this!!!

Tony
96 S6

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of Alvin Labonite
Sent: November-17-11 8:55 PM
To: s-car-list at audifans.com
Subject: [s-cars] Rough idle?



Getting a rough/stumble when given gas at idle somewhere around 1200-1500
rpm. Engine vibrates a little and noticeable. But when tach is below that
range and no gas pedal interaction it's smooth and above that range say
1800k and above is fine as well. Car pulls strong and smooth. I haver newer
OEM coils and brand new POS.. Coolant temp sensor and O2 sensors are new.
One thing I could think of is vacuum leak - but where?

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-- 
Alvin