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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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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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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