Novik
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« Reply #45 on: August 18, 2013, 06:37:12 AM »
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Please help with Octavia 1.8T AGU with big turbo from Subaru 2.5 .
When MAF readings goes to 160g/s - ECU close N75, and like limp mode, total loss power, but without DTC, or 00575 - Intake Manifold Pressure 11-10 - Control Limit Not Reached -
I raise KFMLDMX ML-Schwelle fur B_maxflr-Diagnose HFM/HLM 6x6 map, but it not help at all. Maybe is some other MAF limitter ?
RPM load inj.time MAF
2640 5.5 10.75 46.87
2880 5.95 13.31 54.72
3120 6.3 14.34 62.64
3400 6.8 15.74 73.06
3640 7.45 16.32 86.67
3920 8.15 16.32 102.22
4240 8.75 16.32 118.06
4560 9.1 16.32 131.87
4920 9.35 16.32 145.9
5200 9.3 16.32 154.86
5520 9.05 16.32 159.17
5520 1.65 2.5 29.65
5200 1.3 2.3 21.11
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fredrik_a
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« Reply #46 on: August 18, 2013, 09:20:23 PM »
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When MAF readings goes to 160g/s - ECU close N75, and like limp mode
What MAF unit are you using and what sensor voltage are you seeing at that stage? |
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Novik
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« Reply #47 on: August 18, 2013, 11:33:49 PM »
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MAF sensor is oryginal in oryginal housing. I don't measure voltage for now.
In MAF linearisation map last value is 673kg/h is about 187 g/s, and if the voltage exceeds the threshold, would appear DTC with sensor voltage to high, but I haven't any MAF related DTC, and car start run OK after drop throttle pedal and full throttle again.
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QuattroEd
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« Reply #48 on: August 19, 2013, 01:25:18 AM »
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what about max VE?
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Novik
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« Reply #49 on: August 19, 2013, 02:14:00 AM »
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What do you mean VE ?
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QuattroEd
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« Reply #50 on: August 19, 2013, 02:53:05 AM »
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VE , load
Theres a table in there somewhere that will limit load vs RPM
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« Last Edit: August 19, 2013, 02:56:51 AM by QuattroEd »
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Novik
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« Reply #51 on: August 19, 2013, 03:28:15 AM »
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IF you mean LDR-Sollwertbegrenzung 16x1 , I change it, but no luck.
Must be MAF 160g/s related I think.
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Novik
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« Reply #52 on: August 21, 2013, 12:27:44 AM »
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Please help with Octavia 1.8T AGU with big turbo from Subaru 2.5 .
When MAF readings goes to 160g/s - ECU close N75, and like limp mode, total loss power, but without DTC, or 00575 - Intake Manifold Pressure 11-10 - Control Limit Not Reached -
I raise KFMLDMX ML-Schwelle fur B_maxflr-Diagnose HFM/HLM 6x6 map, but it not help at all. Maybe is some other MAF limitter ?
RPM load inj.time MAF
2640 5.5 10.75 46.87
2880 5.95 13.31 54.72
3120 6.3 14.34 62.64
3400 6.8 15.74 73.06
3640 7.45 16.32 86.67
3920 8.15 16.32 102.22
4240 8.75 16.32 118.06
4560 9.1 16.32 131.87
4920 9.35 16.32 145.9
5200 9.3 16.32 154.86
5520 9.05 16.32 159.17
5520 1.65 2.5 29.65
5200 1.3 2.3 21.11
Please give any hint  . |
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maZer.GTi
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« Reply #53 on: August 21, 2013, 04:21:57 AM »
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IF you mean LDR-Sollwertbegrenzung 16x1 , I change it, but no luck.
Must be MAF 160g/s related I think.
First of all set Drehzahlschwelle für Dia LDR - Regelabweichung = 6500rpm Then you can tune your Boost, after you tuned your boost you must adjust this value to best point. |
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overspeed
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« Reply #54 on: August 21, 2013, 08:56:55 AM »
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WDKDLDI has nothing to do with this behavior, never touch this and never have similar issues
160g/s are less than MAF max Readings (190g/s), DTC says ECU is unable to reach the specified load... or you spec too high loads that can´t be achieved or there is a leak or MAF problem.
log the N75DC...is it´s near 100% before cuts than you will have to look for leakings or your MAF is defective.
I had a similar behavior with a defective barometric sensor too, but it was erratic
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overspeed
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« Reply #55 on: August 21, 2013, 08:58:15 AM »
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Almost forget...You raised KFLUL ?
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Novik
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« Reply #56 on: August 21, 2013, 09:50:32 AM »
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Thanks for advices, will try it.
Tried to change MAF, but it not help at all.
And yes,KFLUL is raised to 12.75
Will try to rebuild KFLDS to request less load till 4000rpm, and more only on high RPM where turbo have spooled good and requested load is near real.
And will try to change Drehzahlschwelle für Dia LDR - Regelabweichung = 6500rpm
One more question. Looking at one of the AGU big-turbo files, I found changed map called in Damos: Kennfeld tastverhältnisersatzwert für LDR 9x16 , is filled with 5.08% in oryginal, and was changed to 55%. It have some relation to load, but for what ?
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« Last Edit: August 21, 2013, 10:44:27 AM by Novik »
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Novik
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« Reply #57 on: August 23, 2013, 01:15:36 PM »
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Update.
I change Drehzahlschwelle für Dia LDR - Regelabweichung = 6500rpm, rebuild KFLDS to request less load and something still cut boost. Now no DTC stored.
Think is mechanical issue, maybe WG is not OK, or N75 from VAG can't fast regulate Subaru wastegate .
RPM load MAF N75
3480 6.35 68.82 99.6
3920 8.1 101.18 99.6
4520 9.5 137.36 98.4
5360 9.65 164.31 99.6
5240 0.9 32.5 0
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mercuric
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« Reply #58 on: August 26, 2013, 01:20:39 AM »
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Not sure what your wastegate actuator pressure is, not familiar with 1.8T's, but I would assume you should get at least a few PSI even if the control valve is fully open, right?
From your load number dropping down to 0.9, it seems more like you're hitting an injection cut. Not sure about M3.8, but M4.4, which isn't terribly different and I'm quite familiar with, will cut off injection if you cross the overload values defined in TLULN. The M3.8 DAMOS earlier in the thread, for a VR6, has an interesting map:
KFLUL, {Lastschwelle für Turbo-Überladeabschneiden}
-- translates --
KFLUL, {load threshold for turbo overcharge cutting}
Looks like there's a second:
KFLUL2,{Lastschwelle 2 für Turbo-Überladeabschneiden}
My guess would be when load exceeds the value in these maps (unsure why there's 2) it cuts fuel.
Kennfeld tastverhältnis ersatzwert translates to "duty cycle replacement value map". Usually replacement value maps are used in error conditions. I doubt it will do you much good. The tuner of this file may have used it to allow the duty cycle to stay high even in error, instead of setting conditions properly to avoid the error completely.
Curious.. Anyone know what CPU M3.8.2 uses?
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QuattroEd
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« Reply #59 on: August 27, 2013, 09:02:58 AM »
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Update.
I change Drehzahlschwelle für Dia LDR - Regelabweichung = 6500rpm, rebuild KFLDS to request less load and something still cut boost. Now no DTC stored.
Think is mechanical issue, maybe WG is not OK, or N75 from VAG can't fast regulate Subaru wastegate .
RPM load MAF N75
3480 6.35 68.82 99.6
3920 8.1 101.18 99.6
4520 9.5 137.36 98.4
5360 9.65 164.31 99.6
5240 0.9 32.5 0
can you show a log with TB, LOAD, INJ, MAF and N75? earlier log you uploaded showed fuel cut but you said N75 limp, which one is it? or is it both? |
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