TunerPro User Forum

Today i tested it and it worked!

Thanks!

Here is the stock tune file for you to see if you have time: https://www.upload.ee/files/13817304/Stock_M50B25_0261200405.rar.html This is how the file ends: https://www.upload.ee/image/13817343/Untitled_2.jpg to compare, this is how 402 ends: https://www.upload.ee/image/13817342/402.jpg This must b...

I disabled the checksum and the file was not corrected.

But i did found a mistake in the XDF code. <EMBEDDEDDATA mmedaddress="0x799C" is supposed to be <EMBEDDEDDATA mmedaddress="0x799D". But that address is only for viewing, so i doubt it matters.

I will try to disable checksum and see if the xdf still wants to correct something.

The chip itself is B58038 = 27c256 = 32kb. I didnt use the file "BMW_405_1740352_1267357951.bin", but it does look like there are two files in a row to make it 64kb.

Edit:

I compared both stock and tuned files side by side in winols and found that the only changes are ignition value that i changed for testing and the checksum values at 799C, 799D and 799E.

On 402 ecu it corrects checksum values only at 2 places..

Hi guys, So i was getting ready to tune M50B25 again and wasnt expecting any problems. I have tuned 402 ecu-s in the past and used ostrich 2.0 with success. This time i was trying to tune 405 ecu, but i could not get the car to start and i think the problem is with the checksum calculation. Things i...

I did some testing with the MAF input on the ecu. The maf was removed for the testing and i was using a piggyback ecu to emulate the maf. Im sure that there must be some sort of limiter. PT/WOT @ 3200rpm and maf signal of 3,8v , it cuts fuel and maybe retards ignition. PT/WOT @ 3200rpm and 3.5v maf ...

I did a copy-paste in winols and im using X/4.6 conversion in tunerpro on both tables. I think i missed something when copying the 413 table. On 413 ecu, the last value is shown as "00" @ 5V maf voltage, but for the 402 ecu, the last value is 906kg/hr. It looks like maps are shifted by one...

Hello! Has anyone done this with a success? I copied 413 maf table to 402 ecu, but the car falls on its face when i try to accelerate. Is there a MAF plausibility/voltage thresholds on 402 ecu? From the testing that i have done, the 413 MAF signal is about 0.4 - 0.8v lower than 402 maf on low rpm an...

Hey whats up guys! So its obvious that the stock M50 3" maf has its limits, so i was thinking about using two maf sensors for cheap-ish twin turbo setup. The MAF(x2) would be before turbos and bypass valve would be used to recirculate the air back before turbo/after MAF. The problem is figuring...

If the car does not go in to the WOT map, what should I look at then? Its a 325 NV 92 402 motronic 3.1 Best regards Dont care that its old post. I think the problem could be with your TPS sensor. It could not be plugged in or just faulty. If TPS sensor signal reaches to ~3V, the maps are going to W...

So i rewrited 400 bin file with 405 and used 405_soft951.xdf to modify maps and it worked.

Hello! I have been looking for DXF file for this 1990 BMW E34 520i automatic but i cant find it anywhere. XDF is similar to 403 ecu, but the offset is wrong and i dont think cheksum will work. Here is the RAR file. I have some more information about this car/ecu in note file. http://www.upload.ee/do...