TunerPro User Forum

I no think I have made a working difinition file for my 1996 316 M43 with motronic 1.7.3. But I need some help with the RPM scaling. How do I calculate the RPM scale based on the motronic map header? I understand that the last number is ther highest RPM, and the others are used to calculate the rest...

Checksum calculation: I found this post on ECUconnections on how to fix the chechsum manualy: http://www.ecuconnections.com/forum/viewtopic.php?f=2&t=1440 I downloaded the HEX file editor HxD and used it to calculate the 8-bit checksum for the original and modified HEX file. I found that the che...

Here is some updates: - The first two 4 byte changes seems to be the rev limiter - The 16 byte chages are the WOT tables - The 12x12 are probably fuel maps - The 14x16 are probably ignition maps This ECU should be a Motronic 1.7.3. But is this using the WOT tables or not? Some says not, but I would ...

I have done some more work with comparing the files and finding out what is changed. The first two changes is only 4 bytes each, and is propaply to rise the rev limiter. The next four changes is 16 bytes and contains a table with a curve where all the values are incresed and the curve form changed T...

I have compared the .bin files from my car with the E36 316/318 XDF files, and they do not match at all. So I would need a new XDF file to do any serious changes. When I compared the original HEX file from my car and the modified file a have got, there was 16 places the code was changed. HEX file ch...

Thanks for conferming this! Then I have to read it again with the correct settings for the PROM.

I have a BMW 316 1996 with a M43 motor. Thas has a Motronic 1.7, Bosch 0 261 203 660. Can anyone help me getting a XDF difinitions file for this ECU? How similar is this to the M42 (282 og 990 dme)? Where is the rev limiter located in this EPROM? I have read out the .bin file from my car and will or...