BMW 318is Motronic 1.7 Fuel cut rpm address

by **devicc** » Sat Jul 11, 2020 7:14 pm

Can someone help find the adresses needed to disable fuel cut on deceleration in the motronic software,in motronic 2.10.4 which i have experience with there would be 2 adresses needed to be edited DNSAL and DNSLL,I don't know if its the same for motronic 1.7 as there is almost no documentation for this ecu.

I have attached my ORI file which is 214 software (still working on making a mappack for it in winols and a other bin + XDF found on the tunerpro website).Finding the adress needed in the tunerpro bin would be awesome as it could be added to the file for everybody to use.

by **jbdasky** » Wed Oct 14, 2020 7:57 pm

Hello,
the bin file should be 32kb size only. It seems as if someone loaded it 2 times and made 64kb size of it.
Map Index Map Starts at address 45B0h with 4831h then 4837h etc...

you can share your experience and your OLS file.

Number Info´s in the file (read backwards)

5710021620 41265376210 09727110 0062.15
07826RT3394

greetings JB

by **devicc** » Thu Oct 22, 2020 12:18 am

jbdasky wrote:Hello,
the bin file should be 32kb size only. It seems as if someone loaded it 2 times and made 64kb size of it.
Map Index Map Starts at address 45B0h with 4831h then 4837h etc...

you can share your experience and your OLS file.

Number Info´s in the file (read backwards)

5710021620 41265376210 09727110 0062.15
07826RT3394

greetings JB

Yes I think the original EEPROM is 27c256 and i have selected 27c512 when reading it which explains double the size.my mistake :D I dont,have an ols file yet.

Until now i have managed to find 4f32 , 4f3c , 4f54 , 4f5E , 4f68 (4x1) maps which i think are some kind of load referenced cut RPM and between them some temp based maps 4f1C and 4f68 which i also think have something to do with fuel cut. NEar them is also Idle ignition (2 maps) 4f99 and 5188 (this one might be used more when rolling,not sure yet)

I have tried editing these in various logical ways but I cant get it to work.

Can someone with more experience in old motronic tunning please help? At least explain to me how these old motronic systems make fuel cut happen.I have begun to understand the fuel and ignition tables,but this is just not getting to complex.Coming from the diesel tunning world I have problems understanding these old motronic systems.