Hi, a few months ago a tune was done to the car (Golf IV 1.8T AUM 06A906032DR) by a commercial chiptuner and the car did not work correctly, from certain revolutions began to go very rich lambdas and in driving the car was giving jerks.

Because of these problems and no one knew how to give me a solution I decided to learn a little about my ME7.

The first step was to get another ECU to do the tests and load the original software to see possible mechanical faults. My surprise has been when I have seen that even with the soft stock the car is still running very rich:

What can be caused by this behavior ??


Hello, a few months ago a reprogramming was done to the car (Golf IV 1.8T AUM 06A906032DR) by a commercial chiptuner and the car did not work correctly, from certain revolutions began to go very rich and in driving the car was giving jerks.

Because of these problems and no one knew how to give me a solution I decided to learn a little about my ME7.

The first step was to get a switchboard to do the tests and load the original software to see possible faults. My surprise has been when I have seen that even with the soft stock the car is still running very rich (attached image)


What can be caused by this behavior ??

I think LAMBTS is always giving me the richest values ​​I suppose for a high load, but ... Why? Maybe a high IAT? Could this behavior be associated with some mechanical failure?

Attached the complete logs, sorry if they are not very complete. This is the first time I use ME7Logger (awesome program) but I have the problem of not being able to scan more than 25 variables.

Yeah, I know it is very rich, but check this logs on a other 1.8T (attached)

It's a 06A906032QN stock, I dont know if car has better peripheral than my Golf (sure has better IC than my SMIC).

But check the desired Lambda, is the same as mine until 4400 rpms.

Maybe if someone has stock logs from Golf IV 1.8T AUM we can compare.

Thanks

That's because the BTS trigger is set later than in yours.
All stuff that is pretty simple to change

I think that's not the problem, I'm triggered full time in the log, trigger is set in my stock at 400 ° C and up to 4400 rpms my desired Lamda is the same as the other 1.8T plot, from there Mine is much richer

The other car also has high exhaust temperatures, although I could not check it in the file I think it also has LAMBTS active.


What? LAMBTS, MAF or IAT effect?

I do not understand English and something may have escaped me.

A link to a section you mean would be very useful, thanks.

Log tabgbts_w and see how high your modeled EGT values are during all kinds of driving.
You will be surprised how high EGTs are even at idle according to this model, something to keep in mind whentuning tabgbts.

I know, I've been meaning to revert to BTS again because of the better resolution.
But LAMFA and KR have actually been working pretty good for me

Don't bother to try to correlate this. If alpha-n was accurate you wouldn't need a MAF. It isn't. Maybe if it was speed density.

I'm starting to run out of ideas

I've thought to log the lambda variables to see that it's causing such low demands. These are the variables I've seen related to lamda.

ladiff_w         ;{}                                 ; {Regelabweichung Lambda}
lambts_w         ;{LambdaPartProtection}             ; {Lambda f�r Bauteileschutz}
lamelsh_w        ;{}                                 ; {Lambdasoll f�r elektrische Sondendiagnose hinter KAT (Kurztrip)}
lamfa_w          ;{TargetAFRDriverRequest}           ; {Lambdasoll Fahrerwunsch (word)}
lamfaw_w         ;{}                                 ; {Lambdasoll Fahrerwunsch Anteil aus Kennfeld LAMFA}
lamfawkr_w       ;{}                                 ; {Lambdasoll Fahrerwunsch bei Z�ndwinkelsp�tverstellung KR, WL}
lamfaws_w        ;{}                                 ; {Lambdasoll Fahrerwunsch station�rer Anteil}
lamfwl_w         ;{}                                 ; {Offset Motor-Lambda-Soll im Warmlauf}
lamlash_w        ;{}                                 ; {Lambdasoll f�r Test Schwingungspr�fung hinter KAT}
lamrlmn_w        ;{}                                 ; {Lambdasollvorsteuerung zur Verbesserung der Brennbarkeit bei kleinem rl}
lamsbg_w         ;{AirFuelRatioDesired}              ; {Lambdasoll Begrenzung (word)}
lamsoni_w        ;{AirFuelRatioCurrent}              ; {Lambda-Istwert}
lamsons_w        ;{}                                 ; {Lambda-Sollwert bezogen auf Einbauort Lambda-Sensor}
lamzak_w         ;{}                                 ; {Lambdasondenistwert, korrigiert um Zusatzamplitude}

In the attached file there are few more, but not sure if all of they are useful. What variables should log?

Thanks