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Author Topic: nmax problem after installing RS4 ECU into S4  (Read 20820 times)
s-company
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« on: October 01, 2011, 02:07:01 AM »

Hello!
we installed a RS4 ECU into a S4 Year 2000. (because rs4 engine is also installed)
after that the rev limiter is set to 6000rpm, no chance to get higher.
is there any coding possibility in the instrument cluster?
i tried several things, but with no success:-(

many thanks

br
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Rick
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« Reply #1 on: October 01, 2011, 04:46:46 AM »

Have you read the ECU and had a look at the mao? 

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s-company
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« Reply #2 on: October 01, 2011, 05:04:40 AM »

yes map is ok, i tried to tune all revlimit maps, tried stock file and so on, nothing helps.
i think the problem is in the instrument cluster..
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Snow Trooper
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« Reply #3 on: October 01, 2011, 09:21:04 AM »

It's a cluster issue, I have seen it when the ecu is getting a bad rpm, oil or water temp signal.   There are maps that  determine engine speed on signal errors.
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s-company
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« Reply #4 on: October 01, 2011, 09:40:36 AM »

which maps do you mean? the only map i found was the codeword for revlimit, but this deactivates rev limter completely, too dangerous for me.

we also tried to install an rs4 cluster for testing, with this it works.
so i am sure as you said, its a cluster issue..
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Rick
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« Reply #5 on: October 01, 2011, 12:19:06 PM »

Yes it's the cluster. 

Which ECU model is it?

Rick
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s-company
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« Reply #6 on: October 01, 2011, 12:27:51 PM »

its a 8D0 907 551F
but same with 551k
br
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matchew
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« Reply #7 on: October 01, 2011, 12:39:40 PM »

You can solve this by changing tables in the engine ECU.
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s-company
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« Reply #8 on: October 01, 2011, 12:48:37 PM »

hello,
really?
sounds great.
but which maps?
i guess no revlimiter, because i tried all of them...
would be grat if you can help!
br
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Rick
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« Reply #9 on: October 01, 2011, 12:55:13 PM »

I can only see and rpm limiter at 5k for signal failure.
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matchew
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« Reply #10 on: October 01, 2011, 01:15:29 PM »

I can only see and rpm limiter at 5k for signal failure.

Do you mean Nmax for VSS signal error?
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s-company
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« Reply #11 on: October 02, 2011, 04:15:19 AM »

I can only see and rpm limiter at 5k for signal failure.

also this map does not help, i tried all rev limit maps...

@matchew
which tables do you mean?
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matchew
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« Reply #12 on: October 02, 2011, 06:14:48 AM »

Please attach an original version of the file you are using.
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s-company
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« Reply #13 on: October 02, 2011, 09:19:59 AM »

atached is the stock S4 file and also the rs4 file where i have the nmax prob
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Gonzo
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« Reply #14 on: October 02, 2011, 10:30:59 AM »

There is more than one NMAX. There is various NMAX values/maps depending on fault/condition.
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