MB OM647 Sprinter is my map stock?

by **Duckmang** » Sun Aug 30, 2020 3:13 am

I've got a US spec 2006 Sprinter with the 647 engine. Its always seemed too aggressive coming on boost at low throttle so I'm suspecting it may have been tuned at some point in the past. I bought a reader / writer and pulled the software out. The info online says the module should be a EDC16C2 but ascii data in the file says EDC16C31. The software version is 1037371847. I haven't found a source for an original file online so I was wondering if anyone has access to one and either post it, or barring that compare mine and determine if its a tuned file.

Using WinOLS I've pulled out about 255 maps but am struggling to identify them. Online tutorials for other makes haven't helped. I've spent a couple hours looking for maps with axis data that could be a plausible DW map but the only maps with a 0-100% axis really aren't making much sense as a DW map, unless someone has gone in and raised the values a ridiculous amount or there is a seemingly random correction factor. At E647E is my most likely suspect for DW. Can anybody familiar with this module / SW shed some light for me and / or point me towards helpful resources?

Thanks in advance

by **adriancl** » Sun Aug 30, 2020 7:49 am

Hi mate,
your sw is 100% original.DW map address is 61682 size 8x11.ECU is EDC16C31.

by **Duckmang** » Sun Aug 30, 2020 7:07 pm

Many thanks for the help. That map has a plausible curve but the X axis data was not logical (0-8192 :roll: ) and I never would have assumed it could be DW. By applying a 0.0122 offset factor the axis becomes 0-100% Applying a 0.1 offset factor for the data in the table also gives plausible values for NM requested.

I am now curious how many other tables utilize the 0.0122 offset factor. :idea: Much work ahead.

Another thanks for confirming stock software. I often work on these vans and mine seems more eager than most. Granted I drive mine empty and most others are full of tools or RV build-outs. Regardless small throttle application results in aggressive spooling of the turbo. Looking at the DW map I see that 50% throttle onward requests more torque than the engine is even rated for. While I want to eventually tune for a bit more total power higher in the rev range, I want to lessen the low throttle request. I'd like more throttle control and less of an on/off switch.