Milka
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« Reply #15 on: June 25, 2013, 05:21:14 AM »
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That's my original bin
My next step was to test reducing the torque reserves and see how that goes.
Wish I had the original KFMRES tables and idle pid from a manual 4.2 40v, but don't have a properly defined xdf or ols for one.
jibberjive does your car have lightened flywheel and/or twin plate clutch?
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prj
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« Reply #16 on: June 25, 2013, 05:30:11 AM »
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It's nothing to do with torque reserve, the slow path idle pid is most likely interfering.
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jibberjive
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« Reply #17 on: June 25, 2013, 11:42:01 PM »
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jibberjive does your car have lightened flywheel and/or twin plate clutch?
One car had a stock dual mass flywheel, and the other had a steel single piece lightweight flywheel. |
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Bische
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« Reply #18 on: June 26, 2013, 02:22:41 AM »
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Is all modules recoded?
Sounds to me as they are not, I know from other TIP/manual swaps the idle was raised to like 1200-1300rpm until vehicle speed was almost zero, then it went down to normal.
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prj
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« Reply #19 on: June 26, 2013, 03:09:08 AM »
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Yes, they are. Everything is on manual and ABS/ESP operates normally as well.
TCU is disconnected.
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silentbob
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« Reply #20 on: June 30, 2013, 02:26:07 AM »
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Without having looked at your logs it's no surprise that idle control is acting weird if you change from an automatic to a manual transmission. You will most probably have to make big changes to the hole function to get a good result because the system behaves quite different now without the torque converter. Maybe start to compare the parameters to the ones of a S6 manual.
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« Last Edit: June 30, 2013, 02:28:06 AM by silentbob »
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Milka
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« Reply #21 on: June 30, 2013, 04:32:45 AM »
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Totally agree, but funnily enough this is the only thing that is really a pain, the rest is pretty good and that's with 850cc injectors and A8 MAFs. I wish I had a defined XDF or ols for a 4.2 40v manual (A6/S6/A8/S8) but unfortunately I have not been able to get my hands on one. I guess the only other option I have is to learn to use IDA pro and find maps myself...
I was considering comparing 2.7TT files between manual and auto (say M and L) and see which IDLE PID/Torque Reserve etc tables where different, but have not had a chance yet.
Bische, as PRJ says everything is correctly coded, no errors in the ECU or the ABS. Only code I have is the cluster throwing a single code about not being able to talk to the TCU. She idles great the only issue is this one while coasting/slowing down while in gear, as Silentbob says though I think it is probably something in relation to the TC auto settings.
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ddillenger
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« Reply #22 on: July 01, 2013, 01:45:30 AM »
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What, exactly, do you need to find in your bin?
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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Bische
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« Reply #23 on: July 02, 2013, 02:40:26 AM »
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Totally agree, but funnily enough this is the only thing that is really a pain, the rest is pretty good and that's with 850cc injectors and A8 MAFs. I wish I had a defined XDF or ols for a 4.2 40v manual (A6/S6/A8/S8) but unfortunately I have not been able to get my hands on one. I guess the only other option I have is to learn to use IDA pro and find maps myself...
I was considering comparing 2.7TT files between manual and auto (say M and L) and see which IDLE PID/Torque Reserve etc tables where different, but have not had a chance yet.
Bische, as PRJ says everything is correctly coded, no errors in the ECU or the ABS. Only code I have is the cluster throwing a single code about not being able to talk to the TCU. She idles great the only issue is this one while coasting/slowing down while in gear, as Silentbob says though I think it is probably something in relation to the TC auto settings.
If the cluster tries to speak with the TCU it is not coded correctly. I think you are wasting time with idle PID and reserve, the ECU thinks it is still an Tiptronic and sets a raised idle as you coast down in speed. The jerking is likely related to this as the raised idle PID is calibrated to operate against a slipping TC and not a locked up clutch. I think you should look in the Idle speed algorithm and see if you can find wheres a Tiptronic controls a raised idle. |
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Bische
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« Reply #24 on: July 02, 2013, 05:56:23 AM »
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I would try set CWCFS = 0, CWCFS is at 10189.
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prj
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« Reply #25 on: July 02, 2013, 02:15:25 PM »
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I think you are wasting time with idle PID and reserve, the ECU thinks it is still an Tiptronic and sets a raised idle as you coast down in speed. For the final time, it does not. I know what I am doing with these. The idle PID is completely recalibrated on this car. The ECU does NOT think it's a Tip, clutch switch works, cruise control works, clutch pedal disengages cruise, kfmresk works etc. The problem is 90% solved already as well, most of it had nothing to do with idle pid. It's actually perfectly visible from the logs what the problem was. S_fs is completely irrelevant, it does absolutely nothing when b_autget is not set. Making this thread was a mistake in the first place. |
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« Last Edit: July 02, 2013, 02:18:16 PM by prj »
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Milka
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« Reply #26 on: July 03, 2013, 05:24:09 AM »
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Hey guys,
Just wanted to say thanks all you have all got me to the point of getting this sorted, the problem with the oscillations was actually in FUEDK/FUEREG.
ILMRMX
ILMRMN
CWFUEDK
CWFUEREG
I just used RS4 values as I don't have a def file for a V8 manual... If anyone gets hold of an XDF for S6/S8 manual it would be great to see if there are any major differences between the v6/v8.
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Bische
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« Reply #27 on: July 03, 2013, 12:48:53 PM »
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For the final time, it does not. I know what I am doing with these. The idle PID is completely recalibrated on this car. The ECU does NOT think it's a Tip, clutch switch works, cruise control works, clutch pedal disengages cruise, kfmresk works etc.
The problem is 90% solved already as well, most of it had nothing to do with idle pid. It's actually perfectly visible from the logs what the problem was.
S_fs is completely irrelevant, it does absolutely nothing when b_autget is not set.
Making this thread was a mistake in the first place.
Calm down, I did not intend to say you or anyone else is wrong, thats why I wrote "I think". I also did not know you were in the process of diagnosing the condition. I spoke from my own experience, not from a RS6 in particular but 1.8t swaps. And according to my understanding, B_mxgecod is set over CAN from the cluster. And since Milka wrote he still has a cluster code looking for the TCU, I did a 1 + 1 = 2.5 and wrote what I did.  Thanks for documenting the solution, this thread got me really interested about the RS6 V8  |
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prj
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« Reply #28 on: July 03, 2013, 02:51:31 PM »
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This was only 10% of solution, 90% is something else I think the jerkiness is only due to CWFUEREG. |
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