[s-cars] 1995.5 S6 now running rough after warm up

[Jeff Postupack]

Thanks Ian, Jerry and JC !

I swapped the fuel pump it improved.. but after a short drive (up my street)
it stumbled once again  and Check Engine lit up.

I went back to the barn, VAG-COM said Code 00537..

the same damn code I started with at 8AM today..after all the effort and
coaching you guys and QW gave. me.


so I shut it off, gave it a kiss and thaked the Audi Gods for a good ride.

With the Artic cold hitting Monday PM, I'm not gonna work on it for a while.

I'll rent a GD car!

Maybe it is electrical.



JP




On Sun, Jan 19, 2014 at 1:14 PM, John Cunningham <jc at j2c3.com> wrote:

>  Jeff-O!
>
> Bummer dude - though you got yer money's worth outa that beater in the 6th
> or 7th week of re-ownership I suspect, but nonetheless - I too vote for
> other coil-sparking components - but do you have a reason to be sure that's
> not a prob?  I'm tryin to mementomember whats under that ol' black hood.
> Amazin' Kreskin sees 1.8/2.0 coils maybe?
>
> Maybe I should drive up in the newly manualized 540iT next week and show
> ya how real UrS fixin' is done, while simultaneously doing horrific damage
> to your beer supply.  ;^)   Only half-jokin.  I'm overdue to blaze through
> VT and visit some of my ex-hippie friends, maybe sunthin can come
> together.   I can bring parts.  Sure they'll be BMW parts, but they'll be
> parts...  No guarantees, lots of balls in the air ( <-- leavin that one
> open for PK) but maybe sunthin works out...
>
> Off to annihilate a tiny bit more of Belgiums beer supply -
>
> JC
>
>
>
>
> On 1/19/2014 16:07, Jeff Postupack wrote:
>
> I installed a fuel pressure gauge during debug and I see
> about 60 PSI idling, and when I open the throttle, it momentarily drops to
> ~ 55psi, then builds to 70 psi..
> this seems pretty abnormal. Don't ever remember seeing this variation on
> the Pearl S4
>
> Frankly I'm just looking for the push and confirmation to JFDI.
>
> fuel pump that is.. Just Freakin Do It.
>
>
> On Sun, Jan 19, 2014 at 9:44 AM, Jeff Postupack <jeff.postupack at gmail.com> <jeff.postupack at gmail.com>wrote:
>
>
>  Gents.
>
> My old trusty winter  Blk/Blk S6 is now suffering in the barn.  157K miles
> Stage 1, stock all else
>
> I do try to keep up on preventative maintenance, but I may have
> procrastinated too long on one particular item.
>
> After a near flawless 720 run NH to PA- NH last weekend, it developed a
> misfire under boost around Jan 14th  It got worse and worse, until it was
> easy to debug on Thursday.
>
> I isolated that pb to a single Bosch spark plug, however I changed them
> all to new NGK BK7RE. being suspicious (The Bosch I removed were the
> tri-electrode, forgot the P/N)
>
> After plug swap it ran strong up until Sat morning.. when it started
> running so rough that I would not drive it up my hilly driveway, back in
> the barh she goes.
> (Sat am cold start, after warm-up rough idle and very low power,
> stumblinjg)
>
> Code is
>  00537 VAG1551/2 Fault Code Number- See below C/O QW
>
> After checking my records, I changed the easy stuff this morn.
> new fuel filter
> new Fuel regulator
> New Oxygen sensor.
>
> After each component change I cleared codes and ran again.
> 00537 re-activates.
>
>
> This brings me to the last one you guys may say is obvious, Fuel Pump.
> I don't have records on this being changed..Hard to believe but..
>
>
> QshipQ? , Dave Dawson? All takers?
>
> Go ahead, beat me up for not changing the FP, but HELL! It's January in NH!
>
>
> Jeff Posto
>
> Oxygen Sensor Control Limit exceeded,
> fuel pressure too low or too high,
>  intake or exhaust leak,
>  defective ignition system component,
>  intake air leak after air mass sensor,
> O2 sensor is faulty
>
> Symptom: CO before catalyst is below 0.3% or greater than 1.0%, Extremely
> lean or overly rich exhaust, Spark Plug foulin
>
>
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>
> ----------------------------------
> *John J. Cunningham*
>
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