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 Post subject: Lean and rich spikes in SD
PostPosted: Thu May 22, 2025 10:36 am 
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Newbie

Joined: Sat Oct 14, 2023 1:40 pm
Posts: 7
Hi all! Any help will appreciated! I prepare to change my TMIC to FMIC with blow-off valve. Stock bypass valve will take place in Hall of Fame :D
In proccess of VE calibration, I take some problem: in throttle change (tip-in or tip-out) my AFR quickly very lean in tip-in or very rich in tip-out.
Changes in tip-in enrichment, tau enrichment and load smoothing not affect to result. Log, xml and bin attached.
THANKS!
My car:
2005 Subaru Legacy GT 5MT (A2WD012B)
My mods:
Stock EJ20X (without TGV, EGR, secondary air)
DW65C fuel pump
TD04HLA twin-scroll turbocharger
AJS HKS-style 3-inch catless downpipe
Perrin-style TMIC
Pierburg 3-port boost control valve
Deleted rear lambda sensor
MerpMod: Blending SD, LC, Rolling LC, FFS, CEL Flash


Attachments:
SD.zip [606.14 KiB]
Downloaded 33 times
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 Post subject: Re: Lean and rich spikes in SD
PostPosted: Tue May 27, 2025 11:17 am 
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Joined: Tue Jun 18, 2019 1:49 am
Posts: 4
Any idea when you first noticed the lean on throttle? Only after running VE?


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 Post subject: Re: Lean and rich spikes in SD
PostPosted: Sun Jun 01, 2025 7:50 am 
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Newbie

Joined: Sat Oct 14, 2023 1:40 pm
Posts: 7
This problem became obvious after switching to SD and initial tuning of the VE map. At the moment, the problem is partially solved: I changed the load smoothing incorrectly, changed it near 0, and the required values ​​are around 1 (0.95 - 1). There is no complete solution yet. I am going to change the source code and introduce tip-in and tip-out compensation for the VE value, based on the delta throttle value


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