tdi9pd
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« on: May 14, 2017, 07:05:45 AM »
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Hi! I have an Audi A3 2.0TFSI 200hp (BWA engine) with a stage1. The car was running great, and vcds showed all great: 0º timming pulls, good boost regulation...
Now, I have bought a new Revo intake, after install: channel 020 shows: (fuel adaptations show: 1% (idle), 6% (partial), and logging with VCDS I can see 5/6º timming pulls (channel 020).
I think intake needs to be adapted, but in the file I can't find "MLHFM" map (Typical 512x1 MAF linealization map from ME7 (20vt engines)).
I could only find "KFKHFM" (14x14).
Which map do I use in order to adapt de intake? How do I do it?
Regards! Thanks in advice!
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gman86
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« Reply #1 on: May 14, 2017, 08:26:50 AM »
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KFKHFM is what you need to correct the MAF for intakes. Don't forget to bump up KFMLDMX a little in case you end up with a MAF code.
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tdi9pd
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« Reply #2 on: May 14, 2017, 10:02:22 AM »
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KFKHFM is what you need to correct the MAF for intakes. Don't forget to bump up KFMLDMX a little in case you end up with a MAF code.
Hi! Thanks for helping me! Ok! I will correct the maf with KFKHFM. Yes, If MAF dtc appears, I will increase KFLDMX  How do I modify KFKHFM? Ussing %? (Any picture for example?) I think, If 032 channel is: Lambda adaptation (partial) 6,3%. Increase (%) little by little all the map, until get at 6,3% increased at MAX load/rpm value. It`s right? Regards! |
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THANAS
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Yes.
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« Reply #3 on: May 16, 2017, 02:41:45 AM »
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It's likely under reading with the Revo intake. A lower MAF reading gives an artifically lower load value which moves the timing to a column with more advanced timing. This is confirmed by the positive fuel corrections, as fuel volume calcs are based off of the same reading.
A blanket increase will not work as the calibration error will not be linear. You need to log load, rpm and timing pull. In KFKHFM you can increase the factors by a few percent in the load/rpm cells corresponding to where timing pull is occuring.
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nyet
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« Reply #4 on: May 16, 2017, 12:53:53 PM »
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Late to the party but you only need to adjust MLHFM if you change MAF diameters or sensors.
IMO intakes w/o airboxes are notoriously hard to calibrate. They're not recommended unless you are a very good tuner.
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tdi9pd
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« Reply #5 on: May 16, 2017, 04:37:19 PM »
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Late to the party but you only need to adjust MLHFM if you change MAF diameters or sensors.
IMO intakes w/o airboxes are notoriously hard to calibrate. They're not recommended unless you are a very good tuner.
Hi! Thanks for helping me! Yes, in ME7 MLHFM is used to calibrate intakes.(512x1; maf linearization map), but in this ecu (med9), I can`t find this MLHFM map. I think that my file hasn`t MLHFM map..  Some information about this? Thanks! Regards! |
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adam-
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« Reply #6 on: May 17, 2017, 03:53:35 AM »
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That's not what he said.
You use MLHFM to calibrate the MAF/sensor.
KFKHFM is used to calibrate intake.
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aef
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« Reply #7 on: May 17, 2017, 06:15:42 AM »
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For me7 there is something called mafadjust and there are threads about the calculation "old diameter/new diameter" and so on.
can have a look into your file later on.
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gman86
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« Reply #8 on: May 17, 2017, 06:56:58 AM »
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Late to the party but you only need to adjust MLHFM if you change MAF diameters or sensors.
IMO intakes w/o airboxes are notoriously hard to calibrate. They're not recommended unless you are a very good tuner.
There isn't a MLHFM in MED9. Also with the TFSI, the standard airbox and MAF tube are integrated so it's not possible to replace one without the other. The exception is the TT-S which has a dedicated MAF tube. |
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aef
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« Reply #9 on: May 17, 2017, 10:06:29 AM »
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tdi9pd
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« Reply #10 on: May 17, 2017, 11:48:09 AM »
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Hi! Thanks for helphing me! I have found that "new" map: MSHFMTPH  I find stange that MAF-calibration goes up 3275kg/h = 910g/seg. I'm right? Wich is better to calibrate the new MAF diameter? MSHFMTPH or KFKHFM? What we use to calibrate (%): "032 adaptation partial value" or "001 lambda regulation"? Here, attach two logs showing "MAF under-reading"--> wrong timming selection & fuel adaptations--> Timming pulls & throttle -flap close   Thanks everybody for the help! |
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KasperH
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« Reply #11 on: May 17, 2017, 01:09:18 PM »
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i know its off topic.
but what is up with your STFT between 5k-6k RPM?
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« Last Edit: May 17, 2017, 01:19:08 PM by KasperH »
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aef
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« Reply #12 on: May 17, 2017, 02:06:52 PM »
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Try to change the map like the attached file.
bigger values, bigger maf,
small values, stock maf,
third line is difference in %
If you have 170g/sec right now, you will see 230g/sec i hope
whats your pipediameter where the maf is plugged in?
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aef
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« Reply #13 on: May 17, 2017, 02:08:00 PM »
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sorry, file attached. just for comparison, this is from a mk6r.
by the way: you should only log when engine is hot
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« Last Edit: May 17, 2017, 10:45:58 PM by aef »
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prj
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« Reply #14 on: May 17, 2017, 03:35:10 PM »
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i know its off topic.
but what is up with your STFT between 5k-6k RPM?
Out of injector. No shit it knocks it's tits off. |
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« Last Edit: May 17, 2017, 03:38:16 PM by prj »
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