[s-cars] Turbo....anyone have a loaner or one for cheap?

Fri Sep 7 17:24:38 PDT 2012

I had my cats checked (91 200q)  a few months ago by a muffler shop. 
They put it in the rack, drilled holes in the exhaust, ran the engine up 
to about 4k with a meter monitoring things and said no blockage. They 
then welded the small holes shut and charged me nothing for the 10 
minutes it took.  Another shop wanted $80 for the same thing.

I've been chasing a low boost issue for about a year now and finally 
eliminated that.

--mike

On 9/7/2012 5:38 PM, djdawson2 at aol.com wrote:
> Agreed... they will absolutely choke power.  Feeling with your hand at the tailpipe can sometimes give you a clue.  If the exhaust feels like an absolutely even stream of flow, as opposed to noticeable pulsing, that's usually a sign.  Also, that even stream can often seem abnormally hot.
>
> FWIW.
>
> If you have someone follow you while you do a full throttle acceleration, it should also sound like it's wheezing.
>
> Certainly worth a shot, and a very good idea to check.
>
>   
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>   
>
>   
>
> -----Original Message-----
> From: Taka Mizutani <t44tqtro at gmail.com>
> To: s-car-list <s-car-list at audifans.com>
> Sent: Fri, Sep 7, 2012 2:22 pm
> Subject: Re: [s-cars] Turbo....anyone have a loaner or one for cheap?
>
>
> Clogged cats usually make it very difficult to build rpms in the engine. I
> agree with Josh, a lot of times both cats will fail soon after one another-
> anything that causes the destruction of one cat will likely destroy the
> other one as well, unless you had a hard impact physically on one cat only.
>
> It's usually hard to hear a clogged cat IME, although sometimes you can
> hear the substrate rattling around in the case if the material has come
> loose.
>
>
>
> On Fri, Sep 7, 2012 at 4:02 PM, Joshua Van Tol <josh at spiny.com> wrote:
>
>> It's not really that unlikely that both cats would fail at the same time.
>> If the engine is run for a time with a gross misfire, that'll overheat and
>> melt the cats, destroying them more or less simultaneously.
>>
>> Usually, plugged cats are accompanied by a "wheezy" sounding exhaust, but
>> since the URS is so quiet by default, it might be hard to tell.
>>
>> Regards,
>> Josh
>>
>> On Fri, Sep 7, 2012 at 2:22 PM, <djdawson2 at aol.com> wrote:
>>
>>> Very good point... but I'd think it improbable that both cats would fail
>>> at the same time, choking the engine to that extent.
>>>
>>> At least he can determine if it's the turbo in literally minutes.
>>>
>>> Dave
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Steve Mills <s.b.mills at gmail.com>
>>> To: Jim Fleischer <jim at almgt.com>
>>> Cc: s-car-list <s-car-list at audifans.com>
>>> Sent: Fri, Sep 7, 2012 12:28 pm
>>> Subject: Re: [s-cars] Turbo....anyone have a loaner or one for cheap?
>>>
>>>
>>> Another possibility is clogged cats- BTDT. I bought a 92 S4 that had the
>>> same symptoms you describe. The PO spent $2K chasing what he thought was
>>> either a boost leak or an ignition problem, and as soon as I pulled the
>>> cats big chunks fell out and the car ran perfectly.
>>>
>>> On Fri, Sep 7, 2012 at 1:25 PM, Jim Fleischer <jim at almgt.com> wrote:
>>>
>>>> Gentlemen,
>>>>
>>>> I am increasingly realizing that my problems don't lie within the usual
>>>> suspects......everything I have replaced thus far are items that would
>>> fail
>>>> soon anyway since I'm at around 140K miles, such as fuel pump, bleeder
>>>> valve, etc.  I have seen a gradual decline in performance within the
>> last
>>>> month, to the point that I don't even hear the turbo spooling up at
>> all,
>>>> and I am struggling to get up to speed on the highway
>> ramps.....literally
>>>> feels like a normally aspirated engine now, lugging around a very heavy
>>>> car!  So, seeing as the turbo used to at least "scream" (literally) for
>>> the
>>>> last 90K miles (since I bought the car) and now doesn't even whimper or
>>>> slightly whistle, I think that is my next plan of attack.  A few
>>>> questions....
>>>>
>>>> 1. Anyway to "test" the turbo in my driveway without pulling it
>>> out......I
>>>> doubt it, but thought I'd ask.
>>>>
>>>> 2. Anyone have a stock AAN turbo collecting dust somewhere that they
>> are
>>>> willing to let go cheap, or willing to lend to me so I can at least see
>>> if
>>>> this is my issue, then I can either source a decent used or rebuild
>> mine?
>>>>   I am unfortunately not having a second vehicle to drive while I figure
>>>> this out, and need to drive this baby everyday to work.  I am
>> vigorously
>>>> searching for a second beater vehicle, but have not come across the
>> right
>>>> deal yet.
>>>>
>>>> 3. If it is indeed the turbo, am I damaging the engine at all by
>>>> continuing to drive it?  I don't want to screw things up more just due
>> to
>>>> my need for transportation.
>>>>
>>>> Despite the recent difficulties, I still love the car......just want
>> her
>>>> back running well.
>>>>
>>>> Thanks all....and best regards,
>>>>
>>>> Jim Fleischer
>>>> '95 urS6 avant, short on breath
>>>>
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