NefMoto

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!

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!

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.

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!

That's not what he said.

You use MLHFM to calibrate the MAF/sensor.

KFKHFM is used to calibrate intake.

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.

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.

http://nefariousmotorsports.com/forum/index.php?;topic=934.0

Hi! Thanks for helphing me!
I have found that "new" map:

MSHFMTPH

(http://i65.tinypic.com/w7d8c2.jpg)

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

(http://i67.tinypic.com/wvshaf.jpg)

(http://i63.tinypic.com/2nqr215.jpg)



Thanks everybody for the help!  ;)

i know its off topic.

but what is up with your STFT between 5k-6k RPM?

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?

sorry, file attached. just for comparison, this is from a mk6r.

by the way: you should only log when engine is hot

Out of injector. No shit it knocks it's tits off.

Try increasing rail pressure. Not sure what pressure the stock PRV on a BWA cracks open at though.

Can someone explain how hfm6 has to be scaled correctly in med9?

Hi! Thanks! Are you sure that this is the right procedure MAF Scaling?


At first Revo says: "MAF housing scaled to correct factory specification." But it is not true, browsing forums there are lot of people with revo/apr intakes without scaling and with Timming pulls problems.
I this that oem pipediameter is aprox 2,55, and Revo intake is near 2,75

Also Revo says: "Intake compatible with K03 & k04"
Oem k03/04 intakes are the same??  ???

Thanks! Regards!


Hi! Are you sure I need to increase rail pressure?

Thanks!!


I think it's intake fault. Low maf reading, low fuel inyection...

Regards!

No im not sure because i have no knowledge. This is copy past from a file with bigger maf.

Regarding fuel, you should log 1,103 and 106 in one csv.
Maybe low pressure side is bad, maybe high pressure is.

Which hpfp does the car have? hitachi 9.x?

Would recommend to mount old intake and fix fueling first.
Listen to prj :)

Hi! I do you think there isn't enough fuel?
Hi log Low pressure pump & High pressure pump and pressure was constant.

032 lambda partial adaptation was 1% before install intake. ???

Thaks! Regards!

Lambda Regulator in measurement block 1 is at 25% and that is all it can do.
Also injection time is up to 8.xx ms which is the limit!

Ummm.... I thought 8ms was "usual" on tfsi remaps.
8ms, is the limit?

I also think it may be due to very rich target-lambda, I will go up to: 0,78 lambda high revs.

You don't want your injector duration to be that high when you're at higher RPM. If you don't want to raise rail pressure, reduce your requested load.

Is this a standard calibration? If not, up rail pressure.

FPRV will crack at 129bar, pump will struggle to do that in the mid range depending on boost, but will cope top end. Ask for 120bar and log again.

Also, have a look in the AWEA module. You can up the injection advance which should give you a bit more spray window.

Hi for helping me!
I log lpfp, hpfp, load y boost.
Betwen 5500rpm-6000rpm maximum performance on fuel pumps can be appreciated.

Could be failing any fuel pump?

(http://i63.tinypic.com/qqphcj.jpg)



(http://i67.tinypic.com/lei6h.jpg)



(http://i64.tinypic.com/eu4zk4.jpg)


Thanks! Regards

Depending on injection angle and ECU settings 8ms is pretty maxed out.
Start from stock tune and make it from scratch, this is a waste of time.

Have you logged this with stock intake and stock maf maps?

2nd picture shows 103 with current low pressure and there are numbers from 3,5 to 4.5 bar
To be honest I have not that much knowledge about tfsi and low pressure and the controller of the low pressure pump.
But i have logged different tfsi and they are showing higher numbers for this. ~6bar

It could be rescued. 110bar is stock. Those trims will come down with 120bar.

updates?