Initial logs @ idle -- Round 1

[jackyaudi]

Following are my first logs (round 1) for my car fully stopped with some revving. I will do a "round 2" with a friend/fellow AZiner to take it from 2500 RPM to redline on WOT.

Some stats not on the logs:
- Outside temp: -11C or so.
- EGT Temps: 420C @ 760 RPM ; 445C @ 3000RPM.
- Timing Retards (CFs): 0s all across 4 cylns @ idle.

So what do you guys think from this initial data? Am mostly concerned about AFR for now. Any comments welcome.

[ehfour]

Any Reason why your logging your car at idle for A/F?

Did you recently do a major engine build?

I thought, and I could be wrong....that logging provides insight into issues that are happening under "Load"

[jackyaudi]

^^ you are right, the ARF will be really tested during the second round with my friend at higher RPMs.

This was just to get most of the initial data in at idle since its the first time I log my car (got the VAG yesterday as well), and to make sure nothing is really bad. If something is not going well here, then it will only be much worse when I do WOTs and redlines.

[diagnosticator]

Everything looks good so far.

[jackyaudi]

Everything looks good so far.

Thanks for your reply John. The only part I did not know how to interpret was Column "E", the lambda figures in % from block1 and how that relates to the readings in Block31 (#s in red).. I do know that if its minus it means car is running rich, and if positive, car is running lean, but I am not sure why am having both positive and negative numbers on idle.. Also, should I look JUST at block31 for AFR or block1 as well?

[diagnosticator]

Well, the negative values shown (and the positive values too,) are the fuel flow adjustments applied by the ECU to achieve a target lambda of 1.0. The "lambda" label for the two data blocks is not the same parameter. Note also that the trend in the first log of 001, is mostly negative, with coolant temps below normal operating temp, compared to the cyclic variation from negative to positive in the second log of block 001 where coolant temps are at operating temps. For your last question, the relevance of the data is dependent on the context of the situation, it's important to note if the fuel adjustments are near the limits of the ECUs capability, especially if the target lambda is not being achieved.

[diagnosticator]

For more detailed review of the measuring block lables, see the text:

";
; VAG-COM Label File
;
; Audi A4 (8E)
;
; Component: J220 - Engine (#01) - AMB
;
; P/N: 8E0-909-518-???
;
; includes measuring blocks, basic setting, coding, coding-ii and adaptation
;
; This file is part of a redirection package,
; make sure you have all of the following files.
;
; 8E-01.LBL
; 06B-909-518-AMB.LBL (1.8l @ 125 HP - AMB)
;
; created on 27/Jul/2006 by Sebastian Stange ([email protected])
;
; last modification: 24/Apr/2008
;
; requires VAG-COM 603.4 or above
;
;
;---------------------------------------------------
;
; measuring blocks & basic setting
;
;---------------------------------------------------
;
;
001,0,General
001,1,Engine Speed,(G28),Specification (Idle): 700...860 RPM
001,2,Coolant,Temperature (G69),Range: -40.5...+135.0 °C\nSpecification (Warm): 80.0...115.0 °C
001,3,Lambda Control,Bank 1
001,4,Basic Setting,Requirements,see labelfile
; 1xxxxxxx - Coolant temperature above 80 °C
; x1xxxxxx - Engine speed below 2000 RPM
; xx1xxxxx - Throttle valve closed
; xxx1xxxx - Lambda regulation correct
; xxxx1xxx - State of idle
; xxxxx1xx - A/C system compressor deactivated
; xxxxxx1x - Catalytic converter over 300 °C
; xxxxxxx1 - No malfunction detected by Self-Diagnosis
;
002,0,General
002,1,Engine Speed,(G28),Specification (Idle): 700...860 RPM
002,2,Engine Load,,Specification (Idle): 13.0...45.0 %
002,3,Injection Timing,,Specification (Idle): 1.0...4.0 ms
002,4,Mass Air Flow,(G70),Specification (Idle): 2.0...4.5 g/s\nSpecififcation (Load): 90.0...100.0 g/s
;
003,0,General
003,1,Engine Speed,(G28),Specification (Idle): 700...860 RPM
003,2,Mass Air Flow,(G70),Specification (Idle): 2.0...4.5 g/s\nSpecififcation (Load): 90.0...100.0 g/s
003,3,Throttle Valve Angle
003,4,Ignition,Timing Angle
;
004,0,General
004,1,Engine Speed,(G28),Specification (Idle): 700...860 RPM
004,2,Battery Voltage,(Terminal 30),Specification: 11.0...15.0 V
004,3,Coolant,Temperature (G69),Range: -40.5...+135.0 °C\nSpecification (Warm): 80.0...115.0 °C
004,4,Intake Air,Temperature (G42),Range: -40.5...+135.0 °C\nSpecification (Warm): < +80.0 °C (max. +115.0 °C)
;
>
>
>
030,0,Lambda Control (Sensor Status)
030,1,Bank 1,Sensor 1
; 1xxxx - Lambda Sensor Control Cyl. 1 active
; x1xxx - Catalytic Converter Venting active
; xx1xx - Lambda Sensor Heating on
; xxx1x - Lambda Sensor ready
; xxxx1 - Lambda Control active
030,2,Bank 1,Sensor 2
; 1xxx - Lambda Control (P-Portion) active
; x1xx - Lambda Sensor Heating on
; xx1x - Lambda Sensor ready
; xxx1 - Lambda Control (I-Portion) active
;
031,0,Lambda Control
031,1,Lambda Control,Bank 1 (actual)
031,2,Lambda Control,Bank 1 (specified)
;
032,0,Lambda Control (Mixture Adaptation)
032,1,Adaptation (Idle),Bank 1 Sensor 1
032,2,Adaptation (Partial),Bank 1 Sensor 1
;
033,0,Lambda Control
033,1,Lambda Control,Bank 1 Sensor 1
033,2,Sensor Voltage,Bank 1 Sensor 1
;
>
>
>
;C00,Engine (J220) Coding
;C01,
;Component:1.8L R4/5VT G05 0001, Coding:0016751
;
;
;---------------------------------------------------
;
; login/coding-ii
;
;---------------------------------------------------
;
;
L00,Engine (J200) Coding II
L01,11463 = Cruise Control Activation
L02,16167 = Cruise Control Deactivation
;
;
;---------------------------------------------------
;
; adaptation
;
;---------------------------------------------------
;
;
A001,0,Idle Speed
;
;
;---------------------------------------------------
;
; readiness
;
;---------------------------------------------------
;
;
O,06B-909-518-AMB
;
"
end.

[jackyaudi]

^^ awesome info, thanks