jyoteen

Dealer/Scammer/Stealer/etc. called me today to let me "know" that my turbos were blown. Then he preceeded to ask me whether I have modified my fuel injection system, and if I have modified the ECU at all.

Is there someone in LA that can independently diagnose this issue?

I don't think that the turbos are blown. The weather in LA has been very warm lately and part of the power loss may be contributed to this. I have also replaced my TBB, yet there was a sound of leaking air under heavy throttle.

If there has been anyone here with blown turbos, can you email me?

Thanks.
Jyoteen<p><a href="http://registry.audiworld.com/audi/registry/details.asp?car=3559"><img src="http://pictureposter.audiworld.com/AudiWorldPics/2000/jyoteen_sig3.gif" border="0"></a>

LCP

...they made their diagnosis.

Alih

Last week I took mine to get it checked. My right turbo was too noisy to my taste. Ran a test on mine and another new S4 same results. No difference in codes. We took for a ride and the mechanic did agree that it was noiser than usual but no problem though. We did check tbb also. Loss of power can be due to weather conditions too. Believe me if you had a blown turbo you would notice it...It sounds like a siren (a very loud one!)

CBJ

Mine are not blown, however, my dealer told me today after inspecting my oil leak it was normal turbo seepage. Did you have any oil leaking?

LCP

Specifically, where was the oil leaking? Everybody, please, be specific...

jyoteen

I spoke with the techinician that has been working on the car and he mentioned that there was no oil leak.

He did check the channel which measures the air flow sensor and it was showing an overboost condition. And barring much else, he noticed that the TBB was intact.

This in combination that the turbos were whining more than the usual (I really don't know what the usual amount is as it seems to differ), he said that my turbos were on their way to seizing.

He also mentioned that he had a stock S4 there that was whining more than the usual and the turbos were supposed to come in today as well.

He also said that that no one wants to replace these turbos because the engine has to be taken out and it is not worthwhile to do these replacements.

In addition, he mentioned that the first couple of years, the 1.8T's were blowing turbos because of the oil line was heating up too much. Could it be that the S4 engine is producing so much heat because of the shear amount of componentry packed within a similar space that the heat produced by the engine leads to accelerated aging and failure of the components?

He suggested that I put in the stock ECU and take it to another dealer.

Any opinions?

He will give me the VAG readout with the overboost values. Maybe some comparison can be made.<p><a href="http://registry.audiworld.com/audi/registry/details.asp?car=3559"><img src="http://pictureposter.audiworld.com/AudiWorldPics/2000/jyoteen_sig3.gif" border="0"></a>

esfor

A lot of people have been getting siren noise. I was told it was pretty normal. I had a siren before and after chipping. Esp at around 2000 RPM and moderate throttle. (but no loss in power) Does anyone know more about this sound?

jyoteen: what other symptoms did you have?

jboo7: what was the noise that was too much for your taste? Siren?

thanks,
Alex<p><img src="http://pictureposter.audiworld.com/AudiWorldPics/2000/esforf1.jpg">

nate

Interesting... one of the changes from the Euro S4 and the US S4 is that the Euro one has an oil cooler (mounted in front of the radiator). Could this be the solution?

-nate

drhaller

a defective (I found it in two pieces) "wastegate boost regulation valve" (N75 for you RB manual owners).

I'm sure it was a pretty cheap part... a plastic/metal gizmo with a low quality feel similar to a 1/4" drip system "T" component. It was made by Eaton.

I really hope that if I had not diagnosed and found the problem that the dealer would not have replaced the turbos.

/dan

Johannes Erdfelt

Wonder why they didn't bring it to the US?