Datalog M2 hesitation & weak pull – can someone check my log?

[caniiim]

Hey Guys!

Here’s a datalog from my M2. The car is running MHD Stage 2+ on 98 RON, but I usually fill up with Shell V-Power 100 RON.

Installed mods:

• Wagner Competition EVO 1 intercooler
• do88 charge pipe and boost pipe
• BMC air filter
• XHP Stage 2 (transmission tune)
• Stock exhaust and stock downpipe
• New spark plugs and ignition coils (plugs not gapped)

I have a feeling there might be a boost leak. Could someone take a look at my log? I do have some knowledge myself, and to me, the log looks mostly fine — but the car feels a bit sluggish, especially under partial throttle. Sometimes it even refuses to upshift uphill, even though it clearly could. Also, it just doesn’t feel like it’s putting out full power.

The log was done in 3rd gear from 2500 RPM up to nearly 7000 RPM. Driving mode was with DSC fully off, so no traction/stability assist was interfering.

Thanks a lot in advance, everyone!

View this graph...

 

[wheela]

I'm not too familiar with EWG logs, but it looks pretty good, other than some corrections on one cylinder. If you take multiple logs, does that same cylinder always correct? Your stft% starts going more negative than optimal at the end of your pull, but not horrible. That could indicate a small boost leak, but your load actual follows request pretty well, so probably not a huge deal.

The refusal to upshift could be related to xhp. Do you drive in sport mode? The engine will keep revs higher in sport mode with xhp.