2001 Audi TT Quattro 180HP
Car is Apr Stage II tuned, 4 Bar Bosch Pressure regulator, 034 2.75" MAF housing, 415CC Injectors, N75J Controller, KXY Diverter Valve, K04-23R XS-Power Turbo, 3" Downpipe, 3" full stainless exhaust with resonator, R8 Coil packs, NGK 4776 plugs, 034 Motorsport PCV system, Oil Catch can
Well... I took my car uptown to get my AC recharged it was running pretty much worry free under its current configuration for the past 3 years daily driven minus eating suspensions and steering racks like its cool every year or so. It took them 2 weeks to determine they couldn't recharge the AC. When I got my car back it was all messed up. Wouldn't go above 45mph. I think it was really just bad timing on their part because I got an error for the MAF and the rich fuel trim plus a misfire on 3 +4, there was obvious corrosion on the MAF when I inspected it. I replaced that with an OEM VW one from ECS and replaced my plugs with NGK 4776 (what i've been running since stage 2 a few years back) and new coils. Still Rich Fuel trim...Drove it around a bit longer then my MAP was throwing a code. I replaced that replaced that and my IAT with OEM VW from ECS. Then my 02 sensor started throwing a code for the 02 heater not working so I replaced that (upstream, downstream is tuned out in theory from the APR stage 2 but it's installed on an 02 spacer incase) with a Bosch one from ECS. As I chased this Fuel Trim issue different codes kept popping up till finally past two days i'm just back at
17535/P1127/004391 - Fuel Trim; Bank 1 (Mult): System too Rich. I listened to all my injectors they don't sound abnormal, Just chained my oil no smell of gas, New plugs, New coils. I pulled the vacuum line off the FPR while the engine was running no fuel in the vacuum line and the FPR does seem to be working correctly. I ordered a new boost leak tester but I kinda doubt it's that becasue when I put a vacuum gauge on it was holding steady and gorgeous at idle. I don't have anyone to help me rev it while I watch the gauge so i'll need more vacuum hose before I can tell ya what that does. I believe ages ago I replaced my N80 but it didn't make it onto my maintenance logs. I'm not throwing any evap codes but i'm out of places to look. Everything i've changed has improved the car from when I first got it back but nothing has seemed to cure it.
The only other thing I haven't explored is Fuel Pressure. I'm 80% sure my car has always had a semi faulty check valve in the pump because after sitting overnight it's a bit hard starting unless you prime the key twice. It's been like that since I bought the car about 4 years ago. Can anyone elaborate on Fuel pressure affecting fuel trim and if it could cause a
17535/P1127/004391 - Fuel Trim; Bank 1 (Mult): System too Rich.
I also did some data logging tonight. I wasn't sure what all to log so I just picked some stuff that looked useful. The following: Engine speed, Coolant temp, Lambda - Controller, Ignition timing angle, Coolant again?, Intake Air Temp, Engine Load, Lambda Sensor, Mass air flow, n75 Wastegate, Boost pressure (specified) , Boost Pressure (actual)
https://docs.google.com/spreadsheets/d/1PZnaPVCc26cymw4JOUP2Xmctq_GcyY2rpcveVt_T1MQ/edit?usp=sharing
This is my current maintenance log to go into further detail of what exactly has been serviced
https://docs.google.com/spreadsheets/d/1RVpmLrGnQUnMBsWcMkvCZMUqXIdKB95Q_KQyLFhoXos/edit?usp=sharing
Car is Apr Stage II tuned, 4 Bar Bosch Pressure regulator, 034 2.75" MAF housing, 415CC Injectors, N75J Controller, KXY Diverter Valve, K04-23R XS-Power Turbo, 3" Downpipe, 3" full stainless exhaust with resonator, R8 Coil packs, NGK 4776 plugs, 034 Motorsport PCV system, Oil Catch can
Code:
Wednesday,11,September,2019,23:13:39:37176
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 19.6.1.0 (x64)
Data version: 20190529 DS308.0
www.Ross-Tech.com
VIN: TRUWX28N511026273 License Plate:
Chassis Type: 8N (8N - Audi TT (1999 > 2007))
Scan: 01 02 03 08 15 17 22 35 37 45 55 56 76 77
VIN: TRUWX28N511026273
-------------------------------------------------------------------------------
Address 01: Engine Labels: 06A-906-032-AWP.lbl
Part No: 8N0 906 018 L
Component: 1.8L R4/5VT G 0003
Coding: 07700
Shop #: WSC 14133
VCID: 3A7B14A826CEA19F97-515E
TRUWX28N511026273 AUZ5Z0YD063118
1 Fault Found:
17535 - Fuel Trim; Bank 1 (Mult)
P1127 - 35-00 - System too Rich
Readiness: 0010 1001
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8N0-907-379-MK20-E.clb
Part No: 8N0 907 379 E
Component: ESP 20 CAN V005
Coding: 18446
Shop #: WSC 01236
VCID: 3E7318B83AE68DBFAB-4B1A
2 Faults Found:
01542 - Yaw Rate Sensor (G202)
57-10 - Electric Circuit Failure - Intermittent
01542 - Yaw Rate Sensor (G202)
27-10 - Implausible Signal - Intermittent
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8N0-820-043.lbl
Part No: 8N0 820 043 A
Component: TT-KLIMAVOLLAUTOMAT D03
Coding: 00140
Shop #: WSC 01236
VCID: 285FDEE0C862230FF1-2580
No fault code found.
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8N8-909-601.lbl
Part No: 8N8 909 601
Component: Airbag Front+Seite 2008
Coding: 10103
Shop #: WSC 00037
VCID: 77FDCD9C555C7CF7A8-515E
1 Fault Found:
65535 - Internal Control Module Memory Error
00-10 - - - Intermittent
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8Nx-920-xxx-17.lbl
Part No: 8N1 920 930 J
Component: KOMBI+WEGFAHRS. M73 D55
Coding: 07244
Shop #: WSC 03303
VCID: 387F0EA018C2B38F61-4B00
TRUWX28N511026273 AUZ5Z0YD063118
No fault code found.
-------------------------------------------------------------------------------
Address 22: AWD Labels: 02D-900-554.lbl
Part No: 02D 900 554 D
Component: HALDEX LSC ECC 0011
VCID: 2149C3C4AB58D247B6-4B00
No fault code found.
-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels:. 8Nx-962-267.lbl
Part No: 8N8 962 267 A
Component: Central Lock/Alarm D05
Coding: 15884
Shop #: WSC 09515
VCID: 3F8D65BC3DEC84B7A0-4ECE
2 Faults Found:
01366 - Opened Due to Crash Signal
35-00 - -
01560 - Passenger Door
59-00 - Can't Unlock
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 8E0-951-177.lbl
Part No: 8N8 951 177
Component: Innenraumueberw. D09
Coding: 00001
Shop #: WSC 00000
VCID: 7CF7D2B06C7A5FAFC5-5198
1 Fault Found:
01463 - Alarm triggered by Sensor for anti-theft alarm System
35-00 - -
-------------------------------------------------------------------------------
Address 55: Headlight Range Labels: 4B0-907-357-AUT.lbl
Part No: 4B0 907 357
Component: LEUCHTWEITEREGLER D004
Coding: 00010
Shop #: WSC 01236
VCID: 65C197D4FFF0FE670A-51B6
No fault code found.
End-------------------------(Elapsed Time: 03:08)--------------------------
Well... I took my car uptown to get my AC recharged it was running pretty much worry free under its current configuration for the past 3 years daily driven minus eating suspensions and steering racks like its cool every year or so. It took them 2 weeks to determine they couldn't recharge the AC. When I got my car back it was all messed up. Wouldn't go above 45mph. I think it was really just bad timing on their part because I got an error for the MAF and the rich fuel trim plus a misfire on 3 +4, there was obvious corrosion on the MAF when I inspected it. I replaced that with an OEM VW one from ECS and replaced my plugs with NGK 4776 (what i've been running since stage 2 a few years back) and new coils. Still Rich Fuel trim...Drove it around a bit longer then my MAP was throwing a code. I replaced that replaced that and my IAT with OEM VW from ECS. Then my 02 sensor started throwing a code for the 02 heater not working so I replaced that (upstream, downstream is tuned out in theory from the APR stage 2 but it's installed on an 02 spacer incase) with a Bosch one from ECS. As I chased this Fuel Trim issue different codes kept popping up till finally past two days i'm just back at
17535/P1127/004391 - Fuel Trim; Bank 1 (Mult): System too Rich. I listened to all my injectors they don't sound abnormal, Just chained my oil no smell of gas, New plugs, New coils. I pulled the vacuum line off the FPR while the engine was running no fuel in the vacuum line and the FPR does seem to be working correctly. I ordered a new boost leak tester but I kinda doubt it's that becasue when I put a vacuum gauge on it was holding steady and gorgeous at idle. I don't have anyone to help me rev it while I watch the gauge so i'll need more vacuum hose before I can tell ya what that does. I believe ages ago I replaced my N80 but it didn't make it onto my maintenance logs. I'm not throwing any evap codes but i'm out of places to look. Everything i've changed has improved the car from when I first got it back but nothing has seemed to cure it.
The only other thing I haven't explored is Fuel Pressure. I'm 80% sure my car has always had a semi faulty check valve in the pump because after sitting overnight it's a bit hard starting unless you prime the key twice. It's been like that since I bought the car about 4 years ago. Can anyone elaborate on Fuel pressure affecting fuel trim and if it could cause a
17535/P1127/004391 - Fuel Trim; Bank 1 (Mult): System too Rich.
I also did some data logging tonight. I wasn't sure what all to log so I just picked some stuff that looked useful. The following: Engine speed, Coolant temp, Lambda - Controller, Ignition timing angle, Coolant again?, Intake Air Temp, Engine Load, Lambda Sensor, Mass air flow, n75 Wastegate, Boost pressure (specified) , Boost Pressure (actual)
https://docs.google.com/spreadsheets/d/1PZnaPVCc26cymw4JOUP2Xmctq_GcyY2rpcveVt_T1MQ/edit?usp=sharing
This is my current maintenance log to go into further detail of what exactly has been serviced
https://docs.google.com/spreadsheets/d/1RVpmLrGnQUnMBsWcMkvCZMUqXIdKB95Q_KQyLFhoXos/edit?usp=sharing
Last edited: