BEWARE ALL S4(B5) AND RS4(B5) OWNERS

[Verruckt]

Duh, I think there is serious misunderstanding of electronics and ECU systems in your cars guys...

Signature codes? never heard of that. An EGT passing information onto a MAF? That doesn't exist.

Second thing is that a defective MAF will never show up as a fault code with 5051. The MAF can only be tested dynamically while the car is being driven at WOT. This is why so many people take their cars to the dealer's and the dealer can't find what's wrong with them, because they only test the MAF while the car is sitting in the garage...

HTH,

Mihnea


@DaveP:

Some people have so much knowledge but yet know so little in the areas that matter. I just finished replacing the prefix 'F' sensor with the prefix 'D' sensor I got from the states and am I surprised that my car is returning the neck breaking performance it provided before the defective 'D' was exchanged for an 'F'?No! Sorry S2tuner but I will say and can confirm that you are wrong on this one and Im not the only person to put back the original 'D' part and experience the return of neck breaking torque that was once experienced before. I feel that you have looked into the problem too deeply and your vast aray of electronic knowledge has ensnared you onto a rocky path.The power has returned, S4 performance is through the roof.What more do you need to confirm that Audi have indeed altered the gas temperature sensor in their revised version.Peeps, email em and and give em hell.The least they owe us is an explanation.

You're lost man. Mihnea knows his stuff and he's right.

The EGT sensor can only do two things to the engine...indicate proper operating temperatures or indicate a high EGT condition. In the latter state, it will cause the engine to go into a fuel enrichment safety mode.

The MAF has nothing to do with the EGT sensors, but a bad Bosch MAF can read low and cause a lean/high EGT condition. This will reduce power.

Sorry blower, it's quite obvious you don't fully understand how the electronics work and are jumping to strange conclusions.

[Morpheous]

Blimy what a storm in a tea cup.
The EGT can be seen working in MVB for bank 1 and 2.

You need to RT car at full throttle under load when after five or so seconds you will see the temp increase from the 950C start fig upwards, you can also see the % enrichment taking place.
The F mod is due to the thermistor tip manufacturer change.
The conversion electronics which convert the temp measurement into a pulse-width-modulated square wave signal for the ecu is the same.
A pulse duty factor of <1% or >99% will produce a fault.
This will only be logged when a predetermined enrichment quantity is reached.
A sender fault recognised by the ecu will reduce the charge pressure (loss of power) and enrich the mixture to reduce the charge temp.
You must have a duff sensor.
I am running F type with no loss of power 326 with MTM remap (No other Mods to engine).
But I do also have a new Air Mass Meter!
When ever you see Bank 1 Bank 2 lean mixture logged, this 9/10 times will indicate duff Mass Meter.
Normally though, there wont ever be a fault logged when it fails.
All you do is boot it up the road and look at MVB for g/sec.
While your doing this, check MVB for EGT to see if both are working in unison.

[Golich]

Its reasuring to know that there are folks out there with real knowledge of how these babies - it makes me smile. Stay cool Blower, glad to hear your car is running better no matter what the cause. Audi have less reason to play with these cars now than ever. Just about every one is outwith the standard warranties. And I doubt the turbo replacement issue was/is as bad as some fear. We are but a very small number of S4/RS4 owners on here comparred to the total numbers sold world wide. I like to keep an open mind. So keep us informed.

[Turbo Joe]

Verruckt,
How can I be lost if my car is now operating the way it should?
Isn't this a clear case of me FINDING the problem and rectifing it?
Where am I lost if the car is now fixed?
Did you not read my investigation properly and read the results?
Can you even read and understand the english language?
I never said that Mihnea never knew his stuff, I stated that his vast knowledge of car electronics was of no use in this area due to the problem being simple and evident.
I used my car as a live case study and as proof to support my claims. I also knew of another gentleman who has an RS4 who is based in Turkey who also had the same problems, followed the same steps(put back on the original 'D' part)and the problem was rectified. He case was also used as proof. Lost what part pal?
Clearly my strange conclusions were correct or do you still need help to comprehend what I have displayed before you, besides you brought nothing new to the table, all you have done is quoted from Mihnea. You're firing blanks!! Bring your own information.

[tjclare]

I think you are all being too trustworthy of Audi! Blower has a real and valued point. I have experienced Audi's underhand, sneaky and in some cases illegal code of ethics. Take my recent service the car was running fine, I pick the car up and on the way home decide to open her up, the loss of power was all to evident. Back to the garage to sort it out. On inspection it turns out the new windscreen wipers they had fitted (code 4FUKSAKE) were not only a slightly different shade of black but interestingly a different code (4FUKSAKD) it doesn’t take a rocket scientist to work out that due to the increased wind resistance I was losing up to 0.02% power!
So beware Audi are out to get you. By the way has any one checked their windscreen wiper codes?

[PhilT]

So beware Audi are out to get you. By the way has any one checked their windscreen wiper codes?

LMAO

[TWH]

So beware Audi are out to get you. By the way has any one checked their windscreen wiper codes?

ROFLMFAO

[DaveP]

Awesome post....best one I've seen on the site for ages mate! Had me laughing out loud when I read that! ROFLMAO....

I wondered what was up with my car....maybe I'll take the wipers off altogether and take her for a run!

Top class

[JohnW]

You lot should have watched Fast & Furiousd last night, then you'd have realised the real problem is we should all be driving ricers with NOS and green lights underneath. I have just ordered mine

[Verruckt]

Verruckt,
How can I be lost if my car is now operating the way it should?
Isn't this a clear case of me FINDING the problem and rectifing it?
Where am I lost if the car is now fixed?
Did you not read my investigation properly and read the results?
Can you even read and understand the english language?
I never said that Mihnea never knew his stuff, I stated that his vast knowledge of car electronics was of no use in this area due to the problem being simple and evident.
I used my car as a live case study and as proof to support my claims. I also knew of another gentleman who has an RS4 who is based in Turkey who also had the same problems, followed the same steps(put back on the original 'D' part)and the problem was rectified. He case was also used as proof. Lost what part pal?
Clearly my strange conclusions were correct or do you still need help to comprehend what I have displayed before you, besides you brought nothing new to the table, all you have done is quoted from Mihnea. You're firing blanks!! Bring your own information.

Sir, you're no scientist. Your conclusions and logic are flawed, and you have no idea about the backgrounds of the people you are arguing with.

Those of us who know these cars aren't taking this post seriously.

When parts you design end up on production vehicles, come back to me and try to correct me on engine design. Thanks.

Blower is an appropriate name for you. You're blowing a lot of hot air.

[Turbo Joe]

I think you are all being too trustworthy of Audi! Blower has a real and valued point. I have experienced Audi's underhand, sneaky and in some cases illegal code of ethics. Take my recent service the car was running fine, I pick the car up and on the way home decide to open her up, the loss of power was all to evident. Back to the garage to sort it out. On inspection it turns out the new windscreen wipers they had fitted (code 4FUKSAKE) were not only a slightly different shade of black but interestingly a different code (4FUKSAKD) it doesn’t take a rocket scientist to work out that due to the increased wind resistance I was losing up to 0.02% power!
So beware Audi are out to get you. By the way has any one checked their windscreen wiper codes?

It doesnt surprise me that there are scoffers who are taking my information for a joke and most if not all have not even investigated it for themselves. For those who have a genuine concern about this problem, I will be happy to keep you updated on any changes. I read about a man who lived about 2004 years ago, who came to tell people the truth and he encountered the same scoffing. The similarities are uncanny.

[Verruckt]

I read about a man who lived about 2004 years ago, who came to tell people the truth and he encountered the same scoffing. The similarities are uncanny.

You have to be kidding me.

[tjclare]

I read about a man who lived about 2004 years ago, who came to tell people the truth and he encountered the same scoffing. The similarities are uncanny.

Did I read this correctly! your telling us that Jesus was an RS4 owner?

[Verruckt]

I read about a man who lived about 2004 years ago, who came to tell people the truth and he encountered the same scoffing. The similarities are uncanny.

Did I read this correctly! your telling us that Jesus was an RS4 owner?

LOL!

That's the only logical explanation here. I guess I did learn something from this thread!

[S2tuner]

Jeeeeeeeezus!!!! Now Blower thinks of himself as a second Jesus Christ... ROTFLMAO...

Do you know the jews still don't recognize Jesus Christ as the Messiah? LOL