STFT Active - in Open Loop

FlashPro questions & answers specific to the 2006-2011 Americas Civic Si
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wal
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Re: STFT Active - in Open Loop

Post by wal »

Has anyone else had this problem? Can anyone help me?
I still can't find the issue. In WOT, it switches to Open-Cold for no reason, then switches to Closed.
I can't find any incorrect settings or sensors with erroneous data.
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Spunkster
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Re: STFT Active - in Open Loop

Post by Spunkster »

Post the calibration the datalog was made with
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wal
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Re: STFT Active - in Open Loop

Post by wal »

Spunkster wrote: Wed Jul 01, 2026 9:17 am Post the calibration the datalog was made with
It's similar to the one in the initial post; I've attached a more recent version.
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Spunkster
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Re: STFT Active - in Open Loop

Post by Spunkster »

You cannot disable closed loop in the calibration. IT must still have the OEM snsor for closed loop to work correctly and the aftermarket wideband is only used for datalogging purposes. The is setup in the Options, Settings, Lambda overlay tab.
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wal
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Re: STFT Active - in Open Loop

Post by wal »

Spunkster wrote: Wed Jul 01, 2026 2:38 pm You cannot disable closed loop in the calibration. IT must still have the OEM snsor for closed loop to work correctly and the aftermarket wideband is only used for datalogging purposes. The is setup in the Options, Settings, Lambda overlay tab.
I have the stock O2 sensor, and I don't understand why it's not in "Open-Driving" mode in WOT. I don't intend to disable "Closed loop," just use it for partial pedal operation.

I never touched that setting; I checked both computers where I have FlashPro installed, and they're the same. Should I have "Stock sensor" selected for both options?
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Spunkster
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Re: STFT Active - in Open Loop

Post by Spunkster »

As the factory is a wideband sensor there is really no need to use an aftermarket wideband for the datalogging. If you have it set to the stock sensor then it will not be showing data from the aftermarket sensor. This is only used for the overlays.
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wal
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Re: STFT Active - in Open Loop

Post by wal »

I still don't understand why it's changing to "Open-Cold"
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Spunkster
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Re: STFT Active - in Open Loop

Post by Spunkster »

It probably has to do with the throttle place closing just before hand.
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wal
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Re: STFT Active - in Open Loop

Post by wal »

I don't think so. The car continues accelerating to the rev limiter without issue.
Both the plate and pedal remain at 100%.
It should stay in "Open-Driving" mode throughout the entire WOT.
Something is causing this erroneous condition.
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