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Author Topic: Load not meeting target  (Read 1064 times)
ama11deus
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« on: July 01, 2025, 05:40:33 AM »

Hello fellow nefmotians,

The car I am working with is an audi A4 1.8T AL ECU. The turbo is a modified td05 ts from an evo x. I have been driving it at 280 load for a little while before I got around to changing my clutch. Now everything is ready and I increased ldrxn to 300 just to test it out and adjust kfmiop, but it seems that for some reason rlsol_w is no longer following rlmax and my boost requested is waaaay lower than it was before. The value also seems arbitrary, because KFLDHBN is 2.5 is these areas, kftarx is all 1s, ldbpn is 2000. What I dont understand is why it goes for 2.6 bars (1.6 boost) right away, no overboost first or anything. And now the even more real problem: after changing ldrxn back to 280, load is still not increasing! (IATs are the same all the time <60C). All I changed was kfldhbn limit and ldrxn. Guys, how is this possible? I attach logs and graphs of 280 load working, 280 not working and 300 not working. The boost fluctuates if the pressure is so low, but at higher boosts its all good so please don't be too critical of that, thanks.
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nyet
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« Reply #1 on: July 01, 2025, 12:24:13 PM »

Obey forum rules. Post raw csvs. Last warning.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
ama11deus
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« Reply #2 on: July 01, 2025, 02:05:49 PM »

Hi thanks for the reply. I swear I added the csvs, the site is taking ages to load for me so maybe they just didn't upload for some reason or I forgot to add them after the nth try - sorry for that. It still doesn't let me upload them even in the reply:
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The following error or errors occurred while posting this message:
Your session timed out while posting. Please try to re-submit your message.
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So I cant really add them.

I managed to resolve my issue though: I for some reason mistook KFLDHBN for boost pressure instead of pressure ratio, so I just had to add 1 to all the cells. Found out by logging the right ldrlms_w, which before for some reason I believed was EngineLoadSpecified (which is actually rlmx_w). My mistake. All works correctly now and car goes up to 2.6 bar boost Cheesy
I'm okay with this thread being deleted, since I cant even add csvs.
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