EDC16 REMOVING MAF DIAG LIMIT AT 1275

[vwstuff]

I found :

UACC_RSigBlkGrp_MAP 1F28A8
UACC_ESBFormular_C 1F1CA8
UACC_ESBNormVal_C 1F1ED9
UACC_ESBSigNr_C 1F210A

But I wonder where are located :

sig_qDIAScale_C
sig_qDIAOffset_C

And how to process
I'm stuck !!!!

[DiegoStud]

1C12AE- Sig_qDIAScale_C
1C12AC- Sig_qDIAOffset_C

[vwstuff]

1C12AE- Sig_qDIAScale_C
1C12AC- Sig_qDIAOffset_C

Thanks a lot Diego

[vwstuff]

So : b/4*a*0.1
This is 255/4 *200*0.1 = max at 1275 Mg/Str

1C12AE- Sig_qDIAScale_C value on my car is 0.037
but : (255/4)/200 *0.1 = 0.032 what is wrong ?!

[DiegoStud]

Your welcome, although they are not what you require.
Signal 258 is AFSCD_mAirPerCyl__mAirCyl_DLen1 therefore you need:
1C11C6-Sig_mDIAScale_C
1C11C4- Sig_mDIAOffset_C.

Including modification of NormVal you should be able to read 1625mg/stroke. Beyond that you need to change formula.

Edit: My bad-
1C118A- Sig_mAirCylDIAScale_C- 0.02
1C118A- Sig_mAirCylDIAOffset_C- 0

255/(1275*10)= 0.02

[vwstuff]

Is 1625mg/stroke ( a=255) enough for a 2 liters with a gtb1756 ?


1C1188 for Sig_mAirCylDIAOffset_C

[DiegoStud]

Assuming you want a bit of extra scope to check for boost leaks, 1625mg would be fine for about 3200mbar boost. Plenty.

Remember to modify Sig_mAirCylDIAScale_C to 0.0156.

[DiegoStud]

The following signals are dependant on Sig_mAirCylDIAScale_C, therefore the complete job would also require looking up these signals in UACC_ESBSigNr_C and modifying their respective NormVals also.
300 "AirCtl_mDesVal__mAirCyl_DLen1"
428 "AFSCD_mAirPerCyl1__mAirCyl_DLen1"
429 "AFSCD_mAirPerCyl2__mAirCyl_DLen1"

[vwstuff]

My goal is afr calculation ;
smoke limitation via lambda seen to be not efficient ?!

[Meat-Head]

Wowsere deigostud, your amazing, part of the Spanish Inquisition and you can speak
Numbers and smoke, well done

[vwstuff]

Another fan
Finaly i'm not able to do it ... some think is wrong ?

[DiegoStud]

Thanks Meat-Head!

Smoke limitation by lambda is not what it sounds like on these engines. Lambda is a calculated mAirPerCyl value based on airflow rather than using the lambda sensor directly, which is an incredible disappointment I know.
So in other words it's as efficient as your MAF.

The lambda sensor is used for long-term adaptation in EGR and FMA correction, regulating O2 concentration in the cat/DPF and also to regulating post injection.
In a way, view smoke limitation as controlling the fuel burned in the cylinder and the lambda controlling from the exhaust valves onwards.

With the the diagnostic limits raised though you might be able to log and make you own calculations. From my own calcs if you are still around 2850mbar you shouldn't really be that much further beyond 1275mg.

[vwstuff]

Yes really disappointment regarding the lambda sensor working condition on edc16 ....
My diagnostic limits raised are NOT working properly as mentionned where I'm wrong ? !

[DiegoStud]

194409-Another block of NormVal that needs changing- I'm assuming it has been forgotten as NormVals for 24,25 and 26 are changed and the Formular nearby has been changed to account for boost limits.
Give that a try and report please.

Beyond that it's starting to get difficult and I'll have to ponder I little further- I can see you have made changes to MAF SRC which might help beyond 4000rpm.

Edit: P.S- having RPM and MAF together in one log would be great to make some calculations

[vwstuff]

Sorry i'm confuse : what do you mean by 194409 ?
According to my vcds version and UACC_RSigBlkGrp_MAP I need to change on UACC_ESBNormVal_C : three times : blocks 10, 44 ,133 value 7 and block 45 value 327 ! ?