Audi S2 with more boost problems

[UrS4boy]

ok... if i send my binaries to you... you can just take a look and tell me whats going rong?

Dude: prj is making at least part of a living tuning Motronic and I am guessing that he knows more about the AAN/ABY/ADU than anyone outside of Bosch. You would do well to NOT insult him. If he says something, it is because he knows how the Motronic works in fine detail. Don't doubt what he says just because you think you know the problem. Listen to what he is saying with an open (not closed) mind.

*IF* he helps you, you should be willing to pay him a consulting fee, up front, before he starts. That is IF he agrees to help you. So far you have just p*ssed him off.

So good luck.

[Carl Avant]

more funny .... on par with sand guy

http://www.gixxer.com/forums/showthread.php?t=226570

totally the wrong thread ... how'd that happen - sorry guys .... mods, move it to the "best thread in the world" please

[prj]

You don't even know right now if the problem is due to the ECU or due to something mechanical on the car.

Start by pulling fault codes and seeing which faults are present.

[Guslotti]

You don't even know right now if the problem is due to the ECU or due to something mechanical on the car.

Start by pulling fault codes and seeing which faults are present.

probably he has no more auto diagnosis in his ECU!

[UrS4boy]

probably he has no more auto diagnosis in his ECU!

Why? Because he is a Motronic programming expert and thought that diagnosis stuff was for noobs?

[prj]

Btw thinking a bit...

It can just cut both spark and fuel, and that means someone did some modifications to the program code area.

CPU finds invalid instructions -> logic goes nuts -> watchdog timer resets the CPU... -> no more spark.
Since our old motronic is a quad cpu beast, there are a few cpu's that can reset like this.
Though only two have external EPROM's

Though if it does it on stock software, then that is probably not the issue

[rynaqui]

I guess the moral of the story is, don't take shortcuts, usually end up hitting a brick wall

Though i don't understand much of what is going on with his problem

[rs2spinelli]

Btw thinking a bit...

It can just cut both spark and fuel, and that means someone did some modifications to the program code area.

CPU finds invalid instructions -> logic goes nuts -> watchdog timer resets the CPU... -> no more spark.
Since our old motronic is a quad cpu beast, there are a few cpu's that can reset like this.
Though only two have external EPROM's

Though if it does it on stock software, then that is probably not the issue

PRJ all my eprons i configure the checksan no porob with it! its not a error code... i find the problem today! in napro motronic now say MAP is exeding milivolts =) so thats ok! now just put a 300 or 400 kpa map and this my problem is gone! ty anyway! and i decide today to put a race modules... 800hp i think motronic will not work!

[prj]

PRJ all my eprons i configure the checksan no porob with it! its not a error code... i find the problem today! in napro motronic now say MAP is exeding milivolts =) so thats ok! now just put a 300 or 400 kpa map and this my problem is gone! ty anyway!

Your problem won't be gone. The fault is not due to MAP sensor. Checksums have nothing to do with the ECU running or not.

and i decide today to put a race modules... 800hp i think motronic will not work!

Works just fine with 800 hp, but you will never be able to tune it do to this.

[UrS4boy]

...i find the problem today! in napro motronic now say MAP is exeding milivolts =) so thats ok! now just put a 300 or 400 kpa map and this my problem is gone!

Maybe. If you knew so much about Motronic, you would have known to replace the 250 kPa MAP sensor with a 300 kPa MAP sensor. Do you have any idea what a 400 kPa MAP sensor means?

300 kPa = 3 Bar absolute pressure = about 1.98 Bar (28.8 psi) boost pressure.

400 kPa = 4 Bar absolute pressure = about 2.98 Bar (43.3 psi) boost pressure. Not really feasible on an AAN/ABY/ADU 20VT, even with aftermarket rods, etc.

[Guslotti]

Why? Because he is a Motronic programming expert and thought that diagnosis stuff was for noobs?

no, because is very common people without knowledge try to tune ECU and kill auto diagnosis

[UrS4boy]

no, because is very common people without knowledge try to tune ECU and kill auto diagnosis

Understood. I was being ironic/sarcastic. You *might* have missed that.

[Guslotti]

Understood. I was being ironic/sarcastic. You *might* have missed that.

No, I didn't… but you know, this is not a private conversation and due all previous posts I tried to finish just one dialogue with a 100% understanding for both parts.

[rs2spinelli]

Guys in the error list now is apearing MAP problems.... EXED volts... and now the car is cutting about 0.6 bar!!!! and i stoped tryng to tune the motronic.... just with original program is running fine! but now is cutting again with no boost! and now? what im doing rong? lol!

[Drummer87]

I had on mine map exceeded pressure high. Still can't find the fault. But it's boosts strangely up to 1.4 then cuts to 1.1 sometimes cut at 0.6. But I ain't been tinkering with my ecu was chipped my Paul.