413 Burble/Pops and Bangs

[Blakearaeman]

Hello, Id like to get some advice on tuning burbles on a 413 red label ecu. I there are forums on here about this but I haven't had much luck with them.
I've tried adding fuel and cutting timing on lower load values but it doesn't seem to work (The values are for part throttle). I've seen mentions of a "overrun fuel cut rpm" but I do not see this value anywhere.
I'm running a motronicrt with tunerpro. thanks

[Adhamkhe]

Tried using idle ignition angle 0(rawdata) at the last 2 values? works for getting some pops

[Mantuse27]

You need to find the deceleration( fuel restore) map 1x4, curve with coolant temperature (x) and (y) values as rpm (decimal *40)

fuel restore.png (44.66 KiB) Viewed 562 times

and change the parameters

fuel restore2.png (43.7 KiB) Viewed 562 times

, that then throttle is closed not cutting off the fuel supply.

[Blakearaeman]

Yeah I figured that was how but it seems my XDF file doesn't have this parameter. Is there some way I can get your XDF? Or am I doing something else wrong.

[Blakearaeman]

Also not entirely sure what the "?????" is but its a 5x8 table with revs and volts. Don't think its overrun.

[Mantuse27]

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

Screenshot_20240314_184303_HEX Editor.jpg (198.14 KiB) Viewed 489 times

[Blakearaeman]

How would I get this hex code to function properly as a parameter? I understand basic tuning but haven't figured out how to do this successfully yet. If you couldn't tell I'm a but of a newbie. Thanks

[Mantuse27]

try this:

Code: Select all

<!-- 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>Evilm3666 and others</author>
    <BASEOFFSET offset="0" subtract="0" />
    <DEFAULTS datasizeinbits="8" sigdigits="2" outputtype="1" signed="0" lsbfirst="0" float="0" />
    <REGION type="0xFFFFFFFF" startaddress="0x0" size="0xFFFF" regioncolor="0x0" regionflags="0x0" name="Binary File" desc="This region describes the bin file edited by this XDF" />
  </XDFHEADER>
<XDFTABLE uniqueid="0x11F0" flags="0x0">
    <title>0xDC79    Fuel restore (1x4)</title>
    <XDFAXIS id="x" uniqueid="0x0">
      <EMBEDDEDDATA mmedelementsizebits="8" mmedmajorstridebits="-32" mmedminorstridebits="0" />
      <indexcount>4</indexcount>
      <datatype>0</datatype>
      <unittype>0</unittype>
      <DALINK index="0" />
      <LABEL index="0" value="-37.00" />
      <LABEL index="1" value="-10.00" />
      <LABEL index="2" value="30.00" />
      <LABEL index="3" value="90.00" />
      <MATH equation="X">
        <VAR id="X" />
      </MATH>
    </XDFAXIS>
    <XDFAXIS id="y" uniqueid="0x0">
      <EMBEDDEDDATA mmedelementsizebits="8" mmedmajorstridebits="-32" mmedminorstridebits="0" />
      <indexcount>1</indexcount>
      <datatype>0</datatype>
      <unittype>0</unittype>
      <DALINK index="0" />
      <LABEL index="0" value="0.00" />
      <MATH equation="X">
        <VAR id="X" />
      </MATH>
    </XDFAXIS>
    <XDFAXIS id="z">
      <EMBEDDEDDATA mmedaddress="0xDC79" mmedelementsizebits="8" mmedrowcount="1" mmedcolcount="4" mmedmajorstridebits="0" mmedminorstridebits="0" />
      <decimalpl>2</decimalpl>
      <min>0.000000</min>
      <max>255.000000</max>
      <outputtype>1</outputtype>
      <MATH equation="X*40">
        <VAR id="X" />
      </MATH>
    </XDFAXIS>
  </XDFTABLE>

copy in notepad and save as .xdf

[Blakearaeman]

Wow thank you so much man, I really cant thank you enough. We need more people like you in this world, we really do.

For Future People: specifically, i pasted the code into a notepad like you said, and through tunerpro, open a new xdf and on the bottom right select txt file, then copy the parameter, reopen the cars xdf file, and paste the parameter.

I love you mantuse27