RomRaider

@318Ti it is normal that after rescaling 17 kg/h at warm idle the fueling during driving is quite off (lambda integrator is mostly +20 - 28%).

I am now having 0.98vdc at ignition on, engine off by the way.

Will start retuning fueling.

I repeat myself, the TU maf is made for a 4.0L V8, and our inline 6 at idle are below what it can measure. so yeah the fueling is gonna be out of wack, particularly around idle.

Thanks again. Sorry, I probably missed that message.

During idle the fuel trims are okay after scaling it to like +/- 19kg/h with a 4.9kOhm resistor. However, during driving the fuel trims are too lean (+20 - 25%).

However, will scale my fueling a.s.a.p. so fuel trims are again around 0 and will see if my load / air flow values are equal during some pulls compared to datalogs with stock MAF.

Thanks guys, should be really happy if this will work so I can start with my turbo built next week. Will start a topic about it if people want to, but don't know if it is the right forum for it.

All this stuffing around...
If you had just bought a Nissan maf you'd already be running and ready to go...

Maybe, however the Bosch MAF seems a lots less erratic in regards to load vs a slot style MAF even with a honeycomb air straightener installed.
It’s very smooth and worth the effort in my opinion as I tried both the Nissan and Ford MAFs.

Good to have a few options to choose from.

Same for me, i had crazy erratique readings on the Nissan maf.
Thats why I went to bosch. Didn't have much difficulties with the bosch one after wiring was wired correctly.
Only idle stuff is a bit wanky

Thanks for your help guys.

Have my M62TU MAF up and running good now. Fuel trims are looking good after tuning and LFTF adaption values are within +/- 1%. Am only having a bit more ignition retardation / knock right now I noticed. Maybe because of the bigger 3.5 inch open intake compared to stock which will flow a bit more air into the engine?

Still need to compare load and air flow to my datalog with stock MAF. Did just logged it, but noticed RR did only saved a 1kB file without any data...

To be continued. Thanks again everyone.

Glad to know it’s working for you now!
Let us know if you have any more questions.

Thanks. After reading the whole topic I still have some questions about activating the 2048kg/h mode which I asked in the right topic, but no answer on that yet.

1) activating this mode in RR with my MS41.0 ID40 doesn't look like to be possible, but with MS41.2 stock ROM it is. Any options or should I upgrade to 41.2?

2) If it is activated, is it just as easy as pasting the MAF scaling in it again and there will be no 1024kg/h limit anymore? Or will be dividing all values by 2 needed as I read on MS41 wiki. Still not clear for me.

3) Read that it will be increased by modifying the 256kB binary. But in RR editor I only import and export the 24kB file, where are the modifications for activating 2048 kg/hr mode saved then?

100% wrong. This sensor can measure from -200kg/h (200kg/h backflow) as all HFM5 sensors. 1V means 0kg/h and this is why you should get such reading with ignition on/engine not running.


Also wrong. Fuel trims/LTFTs are looking good because you tweaked your base fuel maps... You are getting wrong load (too low) from bad MAF scaling and this is why your ignition is too advanced.

Then what is the right scaling of a m62tu maf, as you seem so well aware?

Open stock MS62TU file, grab the linearisation, check if the ECU uses offset for MAF linearisation (as for example VAG 2.7TT ECUs do) and paste it into your tune... Unfortunately Bosch ECUs does have some correction maps for MAF readings which make it hard to just paste linearisation from one file into another. That is why you still need to fine tune fuelling and based on changes between stock fuel map and your final revision you will have to readjust ignition advance maps but those changes should be really small as most of the time those corrections I wrote about above are really small.

Hi!

about the 22680 - 7S00A MAF, have some one the Intake Temperatura range?
i will try use the nissan maf air temp sensor in a BMW

If you have heat gun with temperature control handy you can check it on your own... You just need to check sensor resistance at different temperatures, check the resistance of pull-up resistor in ECU and you can calculate voltage output using Vout=Vin*(R2/(R1+R2))

Hi everyone, great discussion, everyone often refers to two Hitachi sensors, one is the one mounted on Nissan 350z and one on unspecified Fords. For that Nissan there is a precise code 22680 7S000 but for the Ford?

Are these attached below?