[V6-12v] Rough Running Engine

Tue Nov 3 10:32:44 PST 2009

All of this is very familiar.  My fuel pump left me stranded also at around 160K miles on a winter evening.  Fortunately, I was about 10 miles from home.   I just did the right head gasket on mine at 180K miles.  Oil was leaking almost as fast as I put it in.

David

________________________________
From: Tom Christiansen <tomchr at gmail.com>
To: Christopher S Gebbie <chrisgebbie at hotmail.com>
Cc: V6 List <V6-12V at audifans.com>
Sent: Tue, November 3, 2009 12:15:05 PM
Subject: Re: [V6-12v] Rough Running Engine

Folks,

My 1994 90S left me stranded with a dead fuel pump once. I remember hearing
a high-pitch whine from the rear starting a couple of months before the pump
failed. The whine would be there during the first couple of miles and be
worse in cold weather (10C/50F and below). It was subtle enough that it
didn't bother me, but loud enough that I noticed and started wondering what
it could be.

The pump died at roughly 160kMiles. I traded the car in at 175k when the
head gasket was leaking to the point of embarrassment (big puddles, lots of
smoke from oil getting burnt on the exhaust pipes).

~ Tom

On Tue, Nov 3, 2009 at 7:42 AM, Christopher S Gebbie <
chrisgebbie at hotmail.com> wrote:

> I would consider the fuel pump as well. They are known to go around that
> mileage and for ~$100 shipped you can replace it for peace of mind. But it
> does sound like wires or vacuum lines. You can get all the hose you need
> for
> under $20 and then be able to rule that out after replacement.
>
> -Chris
>
> -----Original Message-----
> From: v6-12v-bounces at audifans.com [mailto:v6-12v-bounces at audifans.com] On
> Behalf Of David Torrey
> Sent: Tuesday, November 03, 2009 10:29 AM
> To: Roger Woodbury; V6 List
> Subject: Re: [V6-12v] Rough Running Engine
>
> Roger -
>
> I have 180K miles on my '93 100CSQ wagon.  Original plug wires.  I replaced
> plugs 2 months ago and just finished replacing a very bad head gasket that
> was gushing oil. The head gasket was leaking on the inside next to the
> valley pan gasket.  Confused me for quite awhile.  You may be right about
> the plug wires.  It feels like an intermittent skip or slight "jerking"
> when
> traveling at a constant 30 - 45 mph.  Thanks for your help.
>
> David
>
>
>
>
>
> ________________________________
> From: Roger Woodbury <rmwoodbury at roadrunner.com>
> To: David Torrey <davidtorrey2004 at yahoo.com>; V6 List <V6-12V at Audifans.Com
> >
> Sent: Tue, November 3, 2009 10:17:14 AM
> Subject: RE: [V6-12v] Rough Running Engine
>
> Yes, a couple of things come to mind, but it may depend on what you mean by
> "rough" and when that roughness happens.
>
> We developed a certain roughness in my wife's 100CS Avant Quattro two weeks
> ago, and I was immediately concerned because that has happened before.
>
> The problem was ignition wires, and they were replaced with OEM wires and
> the problem went away.  Look there first, and if your wires are old, and
> NOT
> OEM, yank them out and get REAL wires for Audi...Beru or Bosch probably are
> best.
>
> You could have an O2 sensor problem, or depending on miles, you may have a
> hose issue.  We had a hose leaking which was fixed with tape temporarily,
> while new hoses were ordered.  Over the past couple of years we have been
> steadily replacing ALL the rubber hoses and gizzies in the engine
> compartment and will eventually have replaced all the hoses in the fuel
> injection and fuel management system under the hood. There are a lot of
> them, and some are pretty expensive and odd looking.
>
> At 148,000 miles our car runs perfectly, and our intention is to continue
> to
> maintain and drive it until some major component fails...engine or
> transmission, and then we will think about a replacement.
>
> So, pull the codes if you can, or find someone with a VAGCOM who can, but
> I'll bet you have a sparkplug wire issue.
>
> It is important that you find and fix the miss.  It is likely that with
> each
> miss you are letting fuel into the exhaust, and eventually, you will
> destroy
> a catalytic converter (or two). We have had to replace one after the first
> episode of mysterious skip.
>
> Roger
>
> -----Original Message-----
> From: v6-12v-bounces at audifans.com [mailto:v6-12v-bounces at audifans.com] On
> Behalf Of David Torrey
> Sent: Tuesday, November 03, 2009 9:58 AM
> To: V6 List
> Subject: [V6-12v] Rough Running Engine
>
> Are there any 12 valve V-6 owners left?  I have a rough running engine,
> not
> a dead skip.  I can't fiind any faulty hoses  but it seems to me that it
> could be an air leak.  Anyone have any suggestions?
>
> Best regards,
> David
>
>
>
>
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