Closed loop lambdacontrol go static at high rpm WOT

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curamrdan

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	Closed loop lambdacontrol go static at high rpm WOT « on: February 19, 2019, 11:55:35 AM »

Hello, what causing this. Lambda control goes static(not off) at certain RPM point(6000rpm) at wot. Enclosing two developing logs, one si low boost(0.8bar+creep) and second is high boost (1.7bar). Car is bigturbo 1.8t with mafless hack. Or is it due actual lambda is close enought target?


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woj

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #1 on: February 19, 2019, 02:11:25 PM »

So how would you say lambda control "going off" should manifest itself in your logs?


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curamrdan

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #2 on: February 19, 2019, 04:24:37 PM »

Quote from: woj on February 19, 2019, 02:11:25 PM

So how would you say lambda control "going off" should manifest itself in your logs?

You can see, lambdacontrol trace freezes since 6000rpm. In first example it freze at 0, in second freezes at +8%.

I dont know if its just loose of precision in logging or some issue, factory settings.


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nyet

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #3 on: February 19, 2019, 11:07:51 PM »

Who did your mafless hack? How was it done? Is it possible that problems are causing lambda control to turn off?

Without know specifically how the mafless hack was implemented, it will be impossible to debug any fueling problems you see.


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spacey3

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #4 on: February 20, 2019, 02:18:20 AM »

What lambda are you requesting? Can't quite see from screenshots... Post your logs and file (if not commercial).


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prj

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #5 on: February 20, 2019, 03:21:10 AM »

Lambda control gets frozen when BTS is active to prevent engine meltdown by faulty sensor.


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curamrdan

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #6 on: February 20, 2019, 03:30:30 AM »

Ah, yes, i just check when spacey3 ask about AFR request. Confirming, that it happends on BTS activation. Thank you guys.


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nyet

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	Re: Closed loop lambdacontrol go static at high rpm WOT « Reply #7 on: February 20, 2019, 08:58:19 AM »

Quote from: prj on February 20, 2019, 03:21:10 AM

Lambda control gets frozen when BTS is active to prevent engine meltdown by faulty sensor.

Thanks.


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