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Author Topic: Audi S3 1.8T Coldstart Problem  (Read 31654 times)
Dobermann
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« on: December 22, 2010, 08:37:02 AM »

Hello Friends !!! Im new here !!

I hope someone can help me !!

Im looking for the map where is set the min Intake Air Temp limit !! by coldstart the car has no power that means error 17705 !! if i turn off and start again car runs normal !!

I know it is set to 5 degree !! if i set it to -5 oder -10 the problem will be solved !!

maybe someone has done it in the past and know whrere to find it !! must be a singlevalue

im my informations i cant find this map !!!


This Problem have many 1.8T chipped but somtimes happens this if the car is stock too !!

this is the error code http://wiki.ross-tech.com/wiki/index.php/17705/P1297/004759

this happens only on cold days !! maybe someone know what i mean and knows the a solution !!

thank you !!

KIng Regards !!

0261206794
1037360314
8N0906018J 0004
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nokiafix
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« Reply #1 on: December 22, 2010, 01:55:27 PM »

I think the map you need to stop the 17705 code is fvpdkldus in most map its just before kfdluls map for over boost deviation.


I hope it helps, If not let me know and I will look into the file.
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Dobermann
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« Reply #2 on: December 22, 2010, 03:02:40 PM »

I think the map you need to stop the 17705 code is fvpdkldus in most map its just before kfdluls map for over boost deviation.


I hope it helps, If not let me know and I will look into the file.

hello thank you for answer !!! i have spent a lot of time to try to solve it !!

please have a look at the file or tell me what i must change to solve it !! every cold day i get this error 17705 only on cold days !! is the outside temp over 5 or 6 degree that fault will not happen !!!!

thank you for your help !!

king regards dobermann
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hammersword
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« Reply #3 on: December 22, 2010, 08:41:43 PM »

The solution is easy, it is a classic fault on some 1.8T versions! On cold start you will have that issue!

You have change the leak diagnosis or by deactivating at all, or you can start leak diagnosis at higher RPM from cold start,

So if cold start is at 1300rpm, you can start leak diagnosis at 1400 rpm and the problem solved!

very easy
Smiley

It has nothing to do with boost deviation, it is a leak diagnosis bug
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Dobermann
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« Reply #4 on: December 23, 2010, 02:12:45 AM »

The solution is easy, it is a classic fault on some 1.8T versions! On cold start you will have that issue!

You have change the leak diagnosis or by deactivating at all, or you can start leak diagnosis at higher RPM from cold start,

So if cold start is at 1300rpm, you can start leak diagnosis at 1400 rpm and the problem solved!

very easy
Smiley

It has nothing to do with boost deviation, it is a leak diagnosis bug



yes i thought about it !!! but where to find the limiter Huh

im my s3 file i have found this diagnosis

Schwelle Regelabweichung für Diagnose LDR-Regelabweichung positiv

1x1 01EB77

maybe this would be help too to change the  boost deviation

but if its easy only set the diag rpm up to 1400 oder 1500 that can be the solution !!

« Last Edit: December 23, 2010, 02:20:06 AM by Dobermann » Logged
nokiafix
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« Reply #5 on: December 23, 2010, 03:05:45 PM »

The solution is easy, it is a classic fault on some 1.8T versions! On cold start you will have that issue!

You have change the leak diagnosis or by deactivating at all, or you can start leak diagnosis at higher RPM from cold start,

So if cold start is at 1300rpm, you can start leak diagnosis at 1400 rpm and the problem solved!

very easy
Smiley

It has nothing to do with boost deviation, it is a leak diagnosis bug

By tweaking FVPDKLDUS or by setting all points to zero will stop the  17705 fault code and stop the limp mode that comes with it.   
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TTQS
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« Reply #6 on: March 19, 2011, 06:53:50 AM »


this happens only on cold days !! maybe someone know what i mean and knows the a solution

Have you considered that the fault code might be genuine and there might be a faulty component which is sensitive to low temperatures? I.e., before you go tweaking map settings to dial out a 'bug', are you certain you don't have any leaks in the charge air system or a faulty solenoid air divert valve or dump valve which could be sensitive to temperature changes?

I haven't come across this so-called bug before, but boost leaks and faulty valves on the 1.8T motors are extremely common and they don't always throw DTCs, particularly in the case of 'sticky' solenoid-actuated valves. As we all know, leaks after the MAF sensor will result in an enriched mixture. Don't overlook the obvious.  Smiley

Another other issue that can manifest itself during a cold start (i.e. enrichment regime, e.g. for catalyst heating) is if there is a physical overfuel, for instance if a higher pressure fuel pump has been fitted, but the fuel mass to injector on-time conversion factor has not been re-calibrated to take account of that. 4 barg upgrades to the stock 3 barg fuel pump are popular with 1.8T motors but, from the Bernoulli equation, this will give an approximately 15% overfuel across the board.

Just some general issues to think about...

Doug
« Last Edit: March 19, 2011, 07:01:12 AM by TTQS » Logged
hammersword
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« Reply #7 on: April 01, 2011, 02:59:00 AM »


this happens only on cold days !! maybe someone know what i mean and knows the a solution

Have you considered that the fault code might be genuine and there might be a faulty component which is sensitive to low temperatures? I.e., before you go tweaking map settings to dial out a 'bug', are you certain you don't have any leaks in the charge air system or a faulty solenoid air divert valve or dump valve which could be sensitive to temperature changes?

I haven't come across this so-called bug before, but boost leaks and faulty valves on the 1.8T motors are extremely common and they don't always throw DTCs, particularly in the case of 'sticky' solenoid-actuated valves. As we all know, leaks after the MAF sensor will result in an enriched mixture. Don't overlook the obvious.  Smiley

Another other issue that can manifest itself during a cold start (i.e. enrichment regime, e.g. for catalyst heating) is if there is a physical overfuel, for instance if a higher pressure fuel pump has been fitted, but the fuel mass to injector on-time conversion factor has not been re-calibrated to take account of that. 4 barg upgrades to the stock 3 barg fuel pump are popular with 1.8T motors but, from the Bernoulli equation, this will give an approximately 15% overfuel across the board.

Just some general issues to think about...

Doug

Yes it can be faulty component but there are some standard ECU versions that have this issue after remap... On these versions you MUST deactivate leak diagnosis because it is software bug... "Tested with other software version and was ok"
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Dobermann
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« Reply #8 on: April 01, 2011, 06:38:57 AM »


this happens only on cold days !! maybe someone know what i mean and knows the a solution

Have you considered that the fault code might be genuine and there might be a faulty component which is sensitive to low temperatures? I.e., before you go tweaking map settings to dial out a 'bug', are you certain you don't have any leaks in the charge air system or a faulty solenoid air divert valve or dump valve which could be sensitive to temperature changes?

I haven't come across this so-called bug before, but boost leaks and faulty valves on the 1.8T motors are extremely common and they don't always throw DTCs, particularly in the case of 'sticky' solenoid-actuated valves. As we all know, leaks after the MAF sensor will result in an enriched mixture. Don't overlook the obvious.  Smiley

Another other issue that can manifest itself during a cold start (i.e. enrichment regime, e.g. for catalyst heating) is if there is a physical overfuel, for instance if a higher pressure fuel pump has been fitted, but the fuel mass to injector on-time conversion factor has not been re-calibrated to take account of that. 4 barg upgrades to the stock 3 barg fuel pump are popular with 1.8T motors but, from the Bernoulli equation, this will give an approximately 15% overfuel across the board.

Just some general issues to think about...

Doug

Yes it can be faulty component but there are some standard ECU versions that have this issue after remap... On these versions you MUST deactivate leak diagnosis because it is software bug... "Tested with other software version and was ok"


yes right !!  you have to change 3 adresses an the bug is solved !! this problem happens by all 1.8T with 1 MB sw  ( AMK and BAM)
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hammersword
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« Reply #9 on: April 03, 2011, 06:54:05 PM »

I have faced it only in some versions not all!

Not 3bits, just one. Leak diagnosis.....
Smiley

If you don't want to deactivate leak diagnosis you can set it to start from 1500RPM instead of 750 stock

Smiley
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Dobermann
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« Reply #10 on: April 04, 2011, 05:52:46 AM »

I have faced it only in some versions not all!

Not 3bits, just one. Leak diagnosis.....
Smiley

If you don't want to deactivate leak diagnosis you can set it to start from 1500RPM instead of 750 stock

Smiley


IN my Audi S3 and my Cupra R Sw is the stock value 520 rpm
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carlossus
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« Reply #11 on: April 04, 2011, 12:10:48 PM »

I have faced it only in some versions not all!

Not 3bits, just one. Leak diagnosis.....
Smiley

If you don't want to deactivate leak diagnosis you can set it to start from 1500RPM instead of 750 stock

Smiley

Gents,
... I can't find any single "leak diagnosis..." values that have RPM as units. Can you elaborate?
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hammersword
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« Reply #12 on: April 04, 2011, 06:46:14 PM »

I have faced it only in some versions not all!

Not 3bits, just one. Leak diagnosis.....
Smiley

If you don't want to deactivate leak diagnosis you can set it to start from 1500RPM instead of 750 stock

Smiley


IN my Audi S3 and my Cupra R Sw is the stock value 520 rpm


Yes, I may remember wrong that factory setting....

Carl,
this is 1bit value!

I usually deactivate boost deviation and leak diagnosis, or increase the deviation to 500hpa so it is not so sensitive!

BTW I have reach the point that the best setting for a big turbo is a MAFless setup.
No leak problems
No dead MAFs
No crazy fuel trims cause of bad MAF or leak problems

lol
« Last Edit: April 05, 2011, 01:39:42 PM by Tony@NefMoto » Logged

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carlossus
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« Reply #13 on: April 05, 2011, 06:20:43 AM »

Quote
Carl,
this is 1bit value!

So to completely deactivate leak detection is 1 bit (1 out of 8388608).

What about the location  where the detection threshold (RPM) resides. It sounds like a much better option to raise the limit than to disable it?

Thanks!
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hammersword
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« Reply #14 on: April 07, 2011, 05:56:45 PM »

yes, I usually set it to 1500RPM
Smiley
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