TunerPro User Forum

Need to find curves with coolant temperature (d4). 405 dme have about 50 like this maps, which of them is a deceleration map, not many people know. Need to change the parameters and check each one. If don't have emulator, it is not easy to do.

Both motors m20 and m50 have two temperature sensors each, one goes to the DME, the other to the instrument cluster
https://www.youtube.com/watch?v=nQwCjyMr7ag

try this: <!-- Written 03/14/2024 19:10:01 --> <XDFFORMAT version="1.80"> <XDFHEADER> <flags>0x1</flags> <fileversion>1.0</fileversion> <deftitle>maroon label DME 413 with chip number 1267357623</deftitle> <description>for 1994 325i with DME ecu number 0 261 200 413</description> <author>E...

You have to create this parameter to tunerpro, fuel restore map is here:

You need to find the deceleration( fuel restore) map 1x4, curve with coolant temperature (x) and (y) values as rpm (decimal *40) and change the parameters, that then throttle is closed not cutting off the fuel supply.

We take the last bits and get 4537 in decimal= 11B9 in hex, you need last three numbers. Your DME ISN is 01B9