Low Boost Issue with Tune

   #1  

Karnut

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Having an ongoing issue with UM Stage 1 tune on my TT RS. Tried various boost settings but never providing available boost level and boost levels available never go beyond stock boost! Except for UM tune and 1 step colder plugs, only mod is 034 CAI. Running 94 octane at all times.

Have had leak tests, soap tests, visuals and diagnostics of various components hoses, clamps etc. with negative results. Had N75 and a sensor recall replaced. Have never had a fault code. All input indicates a mechanical issue.

Removed CAI and the UM tune and reflashed to stock. Once done stock boost obtained as available and is exceeded by provided so seems that with tune stock ECU setting/controls override and boost is being limited/purged at some point.

Prior to proceeding would appreciate any comments/suggestions that might help narrow this down?

Stock data from log:
Code:
115			
Engine Speed	Engine Load	Boost Pressure	Boost Pressure
(G28)		(specified)	(actual)
 /min	 %	 mbar	 mbar
4200	175.2	2140	2070
4720	180.5	2100	2060
5200	176.7	2130	2020
5680	179.7	2080	2020
6160	178.9	1990	2030
6560	169.9	1920	1930
6880	135.3	1280	1620
6200	16.5	910	1270
5240	116.5	1910	1460
5000	172.9	2110	2000
5280	186.5	2130	2130
5480	189.5	2150	2150
5720	186.5	2060	2080
5920	181.2	2010	2020
6120	177.4	1970	1980
6320	172.9	1940	1950
6520	169.9	1910	1900
6680	167.7	1870	1880
6840	164.7	1640	1880
6840	15	900	1780
6640	17.3	910	1150
6320	17.3	910	1060
4560	116.5	2100	1480
4840	182.7	2100	2090
5080	178.2	2130	2040
5320	182.7	2150	2080
5560	189.5	2160	2150
5760	187.2	2070	2100
6000	182.7	2020	2040
6200	178.9	1980	2020
6400	173.7	1950	1970
6600	169.9	1910	1920
6760	166.9	1890	1900
6840	22.6	890	1770
6560	94.7	1760	1210
5240	174.4	2140	2030
5360	191	2160	2190
5480	191.7	2180	2230
5600	190.2	2150	2180
5480	15	910	1480
Example data log with UM Tune:


Code:
'115			
Engine Speed	Engine Load	Boost Pressure	Boost Pressure
(G28)		(specified)	(actual)
 /min	 %	 mbar	 mbar
4960	169.2	2130	2010
5280	171.4	2130	2000
5520	168.4	2130	1920
5760	161.7	2130	1840
6000	158.6	2130	1790
6200	153.4	2130	1730
6400	148.9	2130	1700
6600	145.1	2130	1690
6800	142.1	2130	1650
6440	6	730	1250
5160	133.1	2130	1630
5320	168.4	2130	1970
5480	169.9	2130	1960
5600	166.2	2130	1920
5720	163.9	2130	1870
5840	162.4	2130	1860
5960	160.9	2130	1810
6080	157.9	2130	1800
6160	155.6	2130	1770
6240	152.6	2130	1770
6360	150.4	2130	1740
6440	148.1	2130	1720
6520	146.6	2130	1720
6600	134.6	640	1610
6360	6	730	1130
6000	6.8	730	890
5520	6	730	830



Code:
Monday,24,October,2016,10:53:04:16508
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 16.8.3.1 (x64)
Data version: 20161010 DS267.0
[url]www.Ross-Tech.com[/url]


VIN: TRUB3AFK3C1900474   License Plate: 
Mileage: 38450km-23891mi   Repair Order: 


Chassis Type: FK (7N0)
Scan: 01 03 08 09 0F 10 14 15 16 17 19 22 25 2E 37 42 44 46 47 4C
          52 55 56 61 77

VIN: TRUB3AFK3C1900474   Mileage: 38450km-23891miles

01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0F-Digital Radio -- Status: Malfunction 0010
10-Park/Steer Assist -- Status: OK 0000
14-Susp. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2E-Media Player 3 -- Status: OK 0000
37-Navigation -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
61-Battery Regul. -- Status: OK 0000
77-Telephone -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (CEP)       Labels: 07K-907-404-CEP.clb
   Part No SW: 8J0 907 404 Q    HW: 8J0 907 404 M
   Component: 2.5l R5/4V TFSI     0021  
   Revision: F7H05---    Serial number: AUX7Z0K6FNK0FC
   Coding: 0113000A180F0160
   Shop #: WSC 01236 785 00200
   VCID: 3B5BCFAA7A25DC9AA9-806E

No fault code found.
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8J0-614-517.clb
   Part No SW: 8J0 910 517 A    HW: 8J0 614 517 F
   Component: ESP MK60E1          0020  
   Revision: 00H60001    
   Coding: 0618391
   Shop #: WSC 01236 785 00200
   VCID: 2A75FAEE85BF5512C2-807E

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: None
   Part No SW: 8J0 820 043 BB    HW: 8J0 820 043 BB
   Component: J255  Klima 1 Zone  0110  
   Revision: 00H09006    Serial number: 00000001193122
   Coding: 1572901
   Shop #: WSC 01236 785 00200
   VCID: 67F343DA562DA87A1D-8032

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels: 8P0-907-063.clb
   Part No SW: 8P0 907 063 S    HW: 8P0 907 063 S
   Component: BCM PQ35  H   110 0653  
   Revision: 00110 AD    
   Coding: 6E000B0FA81336242074C1E101900C4D50F677AA3020D928DC0202440041
   Shop #: WSC 01236 758 00200
   VCID: 44A9B456C7DBA362D8-8010

   Subsystem 1 - Part No SW: 8J1 955 119 A    HW: 8J1 955 119   Labels: 1KX-955-119.CLB
   Component: Wischer AU354  H08 0070 
   Coding: 00FD10

   Subsystem 2 - Part No SW: 8K0 910 557     HW: 8K0 955 559 A  Labels: 8K0-955-559.CLB
   Component: REGENLICHTSEN  H04 0003 
   Coding: 02492C

   Subsystem 3 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

No fault code found.

-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
   Part No SW: 8E0 035 593 P    HW: 8E0 035 593 P
   Component: SDAR SIRIUS     H07 0160  
   Revision: 00000000    Serial number: AUZ4Z7L0602076
   Coding: 0000102
   Shop #: WSC 01236 785 00200
   VCID: 364DDE9E410701F256-8062

1 Fault Found:
02635 - Tuner Not Enabled/Activated 
            000 -  - 
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 7
                    Fault Frequency: 1
                    Reset counter: 34
                    Mileage: 38061 km
                    Time Indication: 0
                    Date: 2016.10.21
                    Time: 15:29:09


-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels: 8P0-919-475-7X1.clb
   Part No SW: 8P0 919 475 M    HW: 8P0 919 475 M
   Component: PARKHILFE 4K  H01 0140  
   Revision: 11001001    Serial number: 36891119209189
   Coding: 00000B
   Shop #: WSC 01236 758 00200
   VCID: 48B1A066FBF3870234-801C

No fault code found.

-------------------------------------------------------------------------------
Address 14: Susp. Elect.        Labels: 8P0-907-376.lbl
   Part No SW: 8J0 910 376 E    HW: 8J0 907 376 E
   Component: J250 Raddaempfung   0110  
   Revision: --H22---    Serial number: 190DPH 1179194
   Coding: 0000072
   Shop #: WSC 01236 785 00200
   VCID: 3147ED82A86926CA03-8064

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8J0-959-655.lbl
   Part No SW: 8J0 959 655     HW: 8J0 959 655 
   Component: 20 Airbag 9.43  H03 0020  
   Revision: 93H03002    Serial number: 0036K005E95J  
   Coding: 0012848
   Shop #: WSC 01236 785 00200
   VCID: 79D715A230992E8AFB-802C

   Subsystem 1 - Part No: 8J0 910 339 A
   Component: BF-Gewichtsens. H02 0030

   Subsystem 2 - Serial number: 05MRC         

   Subsystem 3 - Serial number: 0001.01.0000H0200000000000ÿ†63

   Subsystem 4 - Serial number: 000000ÿ†6332DRB40DC40AA3Zÿ†63

   Subsystem 5 - Serial number: 40AA3Zÿ†6342DRB40DC4C59A6ÿ†63

   Subsystem 6 - Serial number: 4C59A6ÿ†63747RB4064290BCRÿ†63

   Subsystem 7 - Serial number: 290BCRÿ†63847RB40642F14CSÿ

   Subsystem 8 - Serial number: 2F14CSÿ

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.lbl
   Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
   Component: J0527           H37 0070  
   Coding: 0004041
   Shop #: WSC 01236 785 00200
   VCID: 46ADAE5E31E79172C6-8012

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H06 0030

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8J0-920-xxx-17-MY8.clb
   Part No SW: 8J0 920 931 B    HW: 8J0 920 931 B
   Component: KOMBIINSTR. VDO H02 0650  
   Revision: D0H02002    Serial number: 2246K002000357
   Coding: 0117388
   Shop #: WSC 41942 001 1048576
   VCID: 2C79FCF68F4B4B2230-8078

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels: 7N0-907-530-V2.clb
   Part No SW: 7N0 907 530 J    HW: 1K0 907 951 
   Component: J533  Gateway H43 1620  
   Revision:   H43       Serial number: 160711F2000736
   Coding: 354100
   Shop #: WSC 01236 758 00200
   VCID: 3753D39A860DF8FA4D-8062

No fault code found.

-------------------------------------------------------------------------------
Address 22: AWD        Labels: None
   Part No SW: 563 tun ere l    HW: 563 tun ere l
   Component: Haldex 4Motion      T403  
   Coding: 0000001
   Shop #: WSC 00000 000 00000
   VCID: 1D1F2132C4F1B2AAB7-8048

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 8J0 920 931 B    HW: 8J0 920 931 B
   Component: KOMBIINSTR. VDO H02 0650  
   Revision: D0H02002    Serial number: AUX7Z0K6FNK0FC
   Shop #: WSC 00000 000 00000
   VCID: 2C79FCF68F4B4B2230-8078

No fault code found.

-------------------------------------------------------------------------------
Address 2E: Media Player 3 (R199)       Labels: 8T0-035-785.clb
   Part No SW: 8P0 035 785     HW: 8P0 035 785 
   Component: SG ext.Player H08 0100  
   Revision: 00000000    
   Coding: 020302
   Shop #: WSC 01236 758 00200
   VCID: 74C92496D7FB53E2A8-8020

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation        Labels: 8E0-035-192-RNSE.clb
   Part No SW: 8J0 035 193 F    HW: 8J0 035 193 F
   Component: RNS-E PU US     H06 0210  
   Revision: 0000013S    Serial number: AUZBZ7LD801041
   Coding: 0619645
   Shop #: WSC 01236 785 00200
   VCID: 2D7FF1F2B451422A27-8078

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.lbl
   Part No SW: 8J8 959 801 J    HW: 8J8 959 801 J
   Component: Tuer-SG         004 0102  
   Coding: 0001149
   Shop #: WSC 01236 785 00200
   VCID: 44A9B45607DBA362D8-8010

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1Kx-909-14x-44.clb
   Part No: 8J0 909 144 M
   Component: EPS_ZFLS Kl. 239    3201  
   Revision: 00H20000    
   Shop #: WSC 01236 785 00200
   VCID: 3A55CAAE751FE592B2-806E

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8J0-035-223.lbl
   Part No SW: 8J0 035 223 D    HW: 8J0 035 223 D
   Component: J525 Amp High   H04 0160  
   Revision: PROD_01     Serial number: 00000000029757
   Coding: 0246316
   Shop #: WSC 01236 785 00200
   VCID: 256F09D2ECA17A6AEF-8070

No fault code found.

-------------------------------------------------------------------------------
Address 4C: Tire Pressure II        Labels: 8J0-907-274.lbl
   Part No SW: 8J0 907 274 C    HW: 4F0 907 274 
   Component: J793  RKA+      H04 0190  
   Revision: 00000518    Serial number: 00005180075584
   Coding: 0604600
   Shop #: WSC 01236 785 00200
   VCID: 3245E28EAD6F1DD27A-8066

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels: 1K0-959-702-MIN3.lbl
   Part No SW: 8J8 959 802 J    HW: 8J8 959 802 J
   Component: Tuer-SG         004 0102  
   Coding: 0001148
   Shop #: WSC 01236 785 00200
   VCID: 45AFA9520CE19A6ACF-8010

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range        Labels: 4F0-910-357.lbl
   Part No SW: 4L0 910 357 B    HW: 4L0 907 357 B
   Component: AFS 1           H01 0010  
   Revision: 00000001    Serial number:               
   Coding: 0000025
   Shop #: WSC 01236 785 00200
   VCID: 2B7BFFEA8A454C1A39-807E

   Subsystem 1 - Part No: 8E0 941 329 A
   Component: AFS-Modul links H05 0030

   Subsystem 2 - Part No: 8E0 941 329 A
   Component: AFS-Modul rechtsH05 0030

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 8E0-035-192-RNSE.clb
   Part No SW: 8J0 035 193 F    HW: 8J0 035 193 F
   Component: RNS-E PU US     H06 0210  
   Revision: 0000013S    Serial number: AUZBZ7LD801041
   Coding: 0619645
   Shop #: WSC 01236 785 00200
   VCID: 2D7FF1F2B451422A27-8078

No fault code found.

-------------------------------------------------------------------------------
Address 61: Battery Regul. (J840)       Labels: 1K0-907-534.clb
   Part No SW: 7N0 907 534     HW: 1K0 907 951 
   Component: Batt.regelung H43 1620  
   Serial number: 160711F2000736
   Coding: F320115A
   Shop #: WSC 01236 758 00200
   VCID: 71C72D82A8E966CA43-8024

   Subsystem 1 - Part No SW: 8X0 915 181     HW: 8X0 915 181 
   Component: J367-BDM  H07 0140 
   Serial number: 00000000005650940399

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8P1 862 336 A    HW: 8P1 862 336 
   Component: FSE_256x BT     H44 0660  
   Revision: 00000000    Serial number: 00000005156048
   Coding: 0011477
   Shop #: WSC 01236 785 00200
   VCID: 364DDE9E410701F256-8062

No fault code found.

End-------------------------(Elapsed Time: 01:52)--------------------------
 
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   #2  

Jack@European_Parts

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Bad N75, WG hold spring, or small leak at diverter or charge pipe.

I see readiness has been manipulated in addition to DTC report diagnostic stacks.

Always makes it more fun when this is done.

A second stock controller is advised for true diagnostic observations.
 
   #3  

Karnut

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Since I'm not quite sure can you please explain "readiness has been manipulated" and what stock controller replacement will do/allow?
Thanks
 
   #4  

Jack@European_Parts

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The car is tampered altered for illegal defeat of SMOG devices being hardware and software.

Readiness should never appear as if "ready" for a car that has been modified for the race track, or with a deleted CAT, nor for no failure to report DTC's for it.

The only reason someone would do such a nefarious act would be to deceive a governing SMOG agency & for a publically driven vehicle.

Stock controller will permit all relevant tests to be performed to get a true list of faults.........this would include boost positive and negative deviations.

What would be the purpose of removing such a boost deviation calibration table, "even if tuned", just seems to be laziness or an incomplete half-ass project.
 
   #5  

Karnut

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Wow! Would this be done as part of the UM tune?

I purchased this car new from the dealer in 2012 and have done nothing to it until the UM tune this past spring.
Only mods to that point were MSS springs, Haldex controller and camber plates and only mod since was the 034 CAI.

All services work done by local Audi who I trust not to do anything like this so only possible sources would be the tune or the original Audi dealer I purchased it from?

Anyway for me to trace this back as to when it occurred?
 
   #6  

Jack@European_Parts

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Wow! Would this be done as part of the UM tune?

I purchased this car new from the dealer in 2012 and have done nothing to it until the UM tune this past spring.
Only mods to that point were MSS springs, Haldex controller and camber plates and only mod since was the 034 CAI.

All services work done by local Audi who I trust not to do anything like this so only possible sources would be the tune or the original Audi dealer I purchased it from?

Anyway for me to trace this back as to when it occurred?
No kidding?

Illegal SMOG tuning in Canada soon to be enforced......:thumbs:

http://laws-lois.justice.gc.ca/eng/regulations/SOR-2003-2/index.html
https://ec.gc.ca/alef-ewe/default.asp?lang=En&n=7CB7E78A-1
https://ec.gc.ca/lcpe-cepa/


[h=1]Standards for 2004 and Later Model Year Vehicles and Engines[/h][h=2]Emission Control Systems[/h]
  • 11 (1) An emission control system that is installed in a vehicle or engine to enable it to conform to the standards set out in these Regulations shall not
    • (a) in its operation, release a substance that causes air pollution and that would not have been released if the system were not installed; or
    • (b) in its operation or malfunction, make the vehicle unsafe or endanger persons or property in or near the vehicle.
  • (2) No vehicle or engine shall be equipped with a defeat device.
  • (2.1) Despite subsection (2), an ambulance, police vehicle or fire fighting vehicle may be equipped with a defeat device if the device is one that is activated during emergency response operations to maintain speed, torque or power in either of the following circumstances:
    • (a) the emission control system is in an abnormal state, or
    • (b) the device acts to maintain the emission control system in a normal state.
  • (3) Subject to subsection (4), a defeat device is an auxiliary emission control device that reduces the effectiveness of the emission control system under conditions that may reasonably be expected to be encountered in normal vehicle operation and use.
  • (4) An auxiliary emission control device is not a defeat device if
    • (a) the conditions referred to in subsection (3) are substantially included in the emission test procedures referred to in subsection 18(1);
    • (b) it is needed to protect the vehicle against damage or accident; or
    • (c) its use does not go beyond the requirements of engine starting.

  • SOR/2006-268, s. 4(E);
  • SOR/2015-186, s. 6.
 
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   #7  

Karnut

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Just so I understand, whoever/whatever was done, was to deal with SMOG/emissions and this will no longer let my logs indicate the actual conditions and/or any faults?

If so all of my logs to date are not valid? Also any of the tests etc. done by Audi are not correct results potentially?

The only way for me to proceed is to install a new stock ECU?

Final question - for now ha! - ther are a lot of T RS with the UM tunes. Do any have this situation from the tune?
 
   #8  

Jack@European_Parts

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Just so I understand, whoever/whatever was done, was to deal with SMOG/emissions and this will no longer let my logs indicate the actual conditions and/or any faults?
If so all of my logs to date are not valid? Also any of the tests etc. done by Audi are not correct results potentially?
To a degree yes affirmative.

All tuning is illegal unless accompanied by an exemption conformity certificate on record with the EPA of the USA or Canada.

Logs/readiness tests are invalid to a degree, "yes" when tests are bypassed or tables have been modified not setting a DTC, & when it should or not at all in your case.
The only way for me to proceed is to install a new stock ECU?
A qualified lawful repair pertains to all stock hardware and software as per the repair manual and all emissions devices in place.
Final question - for now ha! - ther are a lot of T RS with the UM tunes. Do any have this situation from the tune?
Pretty routine........

All I say is ask any tuner you deal with for their conformity exemption certificate that says what they have done is legal.
Put the documentation where their mouth is.

Just think if VW can get fined 15 billion for far less, what do you think this could net?


There are no substitutions for understanding basics for how things work mechanically!
 
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   #9  

Jack@European_Parts

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Hey buddy never heard back from you on this ...........?
Was this information helpful?

Did you check the mechanicals on your waste-gate, and see if you could log the deviation better; to narrow down the positive or negative deviation?

Did you ask your tuner or dealer for their EPA US or Canada exemption certificate?
 
   #11  

Karnut

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Logged N75 via 118 at same time as others

With Tune

Group C: '118
RPM Temperature Load Temperature
TIME
STAMP /min °C % °C
0.01 5200 44 98.4 31
0.39 5680 44 99.6 33
0.77 6200 44 99.6 33
1.15 6600 44 99.6 36
1.54 6760 44 99.6 37
1.93 6200 45 0.8 40
2.33 4960 45 78.8 41
2.7 5120 46 97.6 42
3.09 5360 48 98.8 45
3.48 5600 48 99.2 47
3.87 5840 50 99.6 50
4.24 6040 51 99.6 52
4.64 6240 52 99.6 54
5.03 6400 54 99.6 57
5.42 6600 54 99.6 58
5.79 6720 56 99.6 60
6.18 6880 57 99.6 62
6.57 6360 59 0 64

Recent Stock
'118
Engine Speed Intake Air Boost Pressure Temperature
(G28) Temperature (G42) Control (N75)
/min °C % °C
4440 20 63.5 12
4920 20 62.4 13
5400 20 69 14
5840 20 77.6 15
6280 20 76.5 15
6680 21 74.1 18
6720 22 0 19
6400 22 45.9 21
4880 22 64.7 21
5080 24 67.8 22
5320 24 71 24
5560 25 71.8 25
5800 26 70.6 27
5960 27 69.8 27
6200 27 69.8 29
6400 28 70.2 30
6560 29 69.8 32
6760 30 69.8 33
6880 31 50.2 35
6840 32 0 36
6480 32 0 36
6240 32 0 35
4720 24 43.5 20
4960 26 62.4 21
5160 27 67.5 23
5400 27 74.1 24
5640 28 75.3 26
5880 28 73.7 27
6080 29 73.3 29
6240 30 72.5 30
6440 31 72.2 32
6640 32 72.2 33
6800 33 72.2 35
6560 34 0 36
5360 34 56.1 37
5280 35 73.3 37
5400 36 72.9 38
5520 36 73.3 39
5560 36 0 39
5520 36 0 39
 
   #12  

Karnut

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Been busy busy but getting clarification on certificates. Thanks for your help and info. I'm also getting comments from several people with similar mods in the US.

Yes that's the CAI I have but have removed it for now to go back to stock. Checked it for install and craxcks etc. but all OK

Irrespective of the certificate issue, I'm trying to narrow down what to do in my next step to understanding/resolving this. I want to know exactly what the issue is and get it fixed then can determine to remain stock or not. Ideally don't want to have to redo all of the time/tests done to date if at all possible.
 
   #13  

Jack@European_Parts

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Again as to your original boost issue........it is either a boost leak, or a mechanical issue with WG or hold spring PSI of WG, or a plugged/restricted exhaust.

Yeah I checked........ UM has no conformity exemption certificates for, or with the CARB/EPA administrators in the USA/Canada, or a pending application for approval, nor for any vehicle whatsoever.

http://forums.ross-tech.com/showthr...smelly-Garbage-can-dumped-on-Motorsports!-WTF


Anything higher or lower than a 150-200MBAR deviation in either direction is unacceptable and should trigger a DTC.

So is your tune a genuine and unaltered 100% UM tune?

How are changing to stock by switchable maps ( simulated stock ) or with an actual re-flash process?
Please explain this in more detail how you are doing this and how long the process takes you?
 
   #15  

Karnut

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100% UM tune and reflash to stock with my original settings. Took about 2-3 hours done by installer and UM.
Can't do UM install at this time. Will have to wait. Winter here and I'd like to resolve leak problem first.

I may have an earlier Auto scan with tune.
 
   #16  

Jack@European_Parts

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Okay you can have a leak without having a leak stock but a leak modified.

Your logs in beginning of thread show you make boost up to 2000 MBAR
Anything requested over 2100 MBAR seems to open the WG and dump the boost from what I see, resulting in lower peak PSI than stock.

This would indicate a weak WG spring for the WG or faulty diverter.
 
   #17  

Karnut

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Thanks Jack!
Appreciate narrowing down first checks to do.
Will provide update when I know.
 
   #18  

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You mentioned 94 octane in your first post.

Is your tune for 93 or is it for 91 octane. Canadian 94 is somewhere between water and 91 octane on a good day.

If you have a tune for 93 and are running Canadian 94 have you logged your ignition pull to see what is going on?

Since you are able to run higher boost levels with lower duty cycle when stock vs tuned that would not indicate a hardware problem and is likely related to the tune or some unwanted condition being seen when running with the tune. If your timing is acceptable I would check to see if you are having issues with the throttle closing.

These are mafless so the airflow is modeled in the ecu, changing the intake to one with drastically different flow characteristics could possibly create an issue with the tune. Since you said the intake was removed in post 12 were the logs in post 11 done with or without the intake?
 
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   #19  

Jack@European_Parts

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You mentioned 94 octane in your first post.

Is your tune for 93 or is it for 91 octane. Canadian 94 is somewhere between water and 91 octane on a good day.

If you have a tune for 93 and are running Canadian 94 have you logged your ignition pull to see what is going on?

Since you are able to run higher boost levels with lower duty cycle when stock vs tuned that would not indicate a hardware problem and is likely related to the tune or some unwanted condition being seen when running with the tune. If your timing is acceptable I would check to see if you are having issues with the throttle closing.

These are mafless so the airflow is modeled in the ecu, changing the intake to one with drastically different flow characteristics could possibly create an issue with the tune. Since you said the intake was removed in post 12 were the logs in post 11 done with or without the intake?


I don't know if I agree with this and would expect an increase in boost momentarily......... before a throttle closure if that is the case.

Yeah when it rains it pours..........huh Wordbank?

Looks like tuners are next don't you think........ and for far worse????????

Patent that.........?

http://www.wsj.com/articles/volkswagen-probe-in-germany-extended-to-chairman-1478429066

http://forums.ross-tech.com/showthr...Motorsports!-WTF&p=76836&viewfull=1#post76836
 
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   #20  

Jack@European_Parts

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Since you are able to run higher boost levels with lower duty cycle when stock vs tuned that would not indicate a hardware problem and is likely related to the tune or some unwanted condition being seen when running with the tune. If your timing is acceptable I would check to see if you are having issues with the throttle closing.
This is why I disagree .........Lets have a look at post #5

Wow! Would this be done as part of the UM tune?

I purchased this car new from the dealer in 2012 and have done nothing to it until the UM tune this past spring.
Only mods to that point were MSS springs, Haldex controller and camber plates and only mod since was the 034 CAI.

All services work done by local Audi who I trust not to do anything like this so only possible sources would be the tune or the original Audi dealer I purchased it from?

Anyway for me to trace this back as to when it occurred?

As stated.......... it's a hardware issue or FOD and most likely not tune related, since it ran fine from spring till about now according to the OP.

:p

Personally unless any tune has a conformity exemption........ it is illegal, and it is more than likely riddled with deletes anyway these days.
Always best to stay stock .........it's legal or is it these days?, and at least can be diagnosed properly.

VCDS becomes almost useless outside of "logging" if tests or DTC's don't report..........or are shut down...
 
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