Peter Badore

Why don't you try this: delete the DTCs and drive only in stock mode. See if any too rich DTCs come back.

BlackS4inNNJ

Running fine in stock mode since Saturday. I'll check for codes tomorrow.

BlackS4inNNJ

still getting same codes but car is running fine and boost is normal.
APR says to log block 32. How do I do that with Vag-Com? thanks

Peter Badore

With VAG-COM open the engine controller, then click on measuring blocks 08, then type in 32.
In VAG-COM short hand this would be 001-08-032.

BlackS4inNNJ

OK, will do. Thanks for the info. Threw a cel last nite and have the same DTC codes, minus the intermittent message and of course only 5lbs boost.
2 Faults Found:

17537 - Fuel Trim; Bank 2 (Mult): System too Rich
P1129 - 35-00 - -
17535 - Fuel Trim; Bank 1 (Mult): System too Rich
P1127 - 35-00 - -

BlackS4inNNJ

Here's the group 32 info from vag com. Can anyone decifer this? Thanks!!

Address 01: Engine (8D0 907 551 H)

18:11:43 Group 032: Lambda Control (Mixture Adaptation)
-0.9 % Adaptation (Idle) Bank 1 Sensor 1
-21.1 % Adaptation (Partial) Bank 1 Sensor 1
-1.5 % Adaptation (Idle) Bank 2 Sensor 1
-21.9 % Adaptation (Partial) Bank 2 Sensor 1
Sunday,11,July,2010,18:14:15:18150
VCDS Version: Release 10.6.0
Data version: 20100630


Address 01: Engine (8D0 907 551 H)

18:14:13 Group 032: Lambda Control (Mixture Adaptation)
-0.9 % Adaptation (Idle) Bank 1 Sensor 1
-21.1 % Adaptation (Partial) Bank 1 Sensor 1
-1.5 % Adaptation (Idle) Bank 2 Sensor 1
-21.9 % Adaptation (Partial) Bank 2 Sensor 1
Sunday,11,July,2010,18:18:18:18150
VCDS Version: Release 10.6.0
Data version: 20100630


Address 01: Engine (8D0 907 551 H)

18:18:16 Group 032: Lambda Control (Mixture Adaptation)
-0.9 % Adaptation (Idle) Bank 1 Sensor 1
-20.3 % Adaptation (Partial) Bank 1 Sensor 1
-1.5 % Adaptation (Idle) Bank 2 Sensor 1
-20.3 % Adaptation (Partial) Bank 2 Sensor 1

Peter Badore

The block 032 is reporting that the engine is running very rich above idle speeds. The Partial adaptation of minus 20+ is trying to lean out the too rich mixture. Idle adaptation is within an acceptable range and is OK.
The question is why is the engine running ok at idle and too rich above idle speeds? I would guess the "fix" is going too be some expensive sensors. Do you have anyone that you can swap or trade for a test of the EGT sensors on your engine?

Pete@ECSTuning

Actually EGTs are presently more than 40% off. So they are in o2 sensor striking range - for anyone wanting replacement EGTs at 41% off - click me. I can see egt's causing this issue but I too like to error on the side of caution.

I think the next step here is to check fuel pressure at the rail with a mechanical gauge and diagnose the FPR.

BlackS4inNNJ

Thanks Peter! I don't realy have another set of EGTs I can test with. I think I'll go with the FPR and guage from ECS. If that doesnt do it I'll go for the EGTs. I'll let everyone know the outcome.

Peter Badore

If the fuel pressure regulator were a problem then I would expect that block 032 would show a rich adaptation
adjustment at idle as well as partial which it does not. I am betting on EGT sensors being needed.