baldur Posted October 25, 2021 Report Share Posted October 25, 2021 Did a LS6 engine on Thunder with two lambda sensors, latest firmware, but I can't seem to find any way to enable closed loop using the second lambda sensor. Can't find any option anywhere to tell it which cylinders belong to the second sensor and so on. Quote Link to comment Share on other sites More sharing options...
Vaughan Posted October 31, 2021 Report Share Posted October 31, 2021 What Lambda mode have you set it to? Quick look at the help manual says that Dual Channel mode is "Only available when Lambda Mode is set to Stoich Mode (Narrow Band) or Stoich Mode (Wide Band)". Quote Link to comment Share on other sites More sharing options...
baldur Posted October 31, 2021 Author Report Share Posted October 31, 2021 I naturally have it set to wide band (auto), as the ECU has inputs for two LSU4.9 sensors which I am using. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 31, 2021 Report Share Posted October 31, 2021 Set to wideband stoich mode. It will still target whatever lambda you require, just it is a slightly simplified strategy compared to auto mode. Quote Link to comment Share on other sites More sharing options...
baldur Posted November 1, 2021 Author Report Share Posted November 1, 2021 I see, I didn't even think to try the "stoich" modes, because that word has a meaning and the meaning is not "whatever lambda" but a specific ratio only. Quote Link to comment Share on other sites More sharing options...
SchuKingR Posted November 1, 2021 Report Share Posted November 1, 2021 10 hours ago, Adamw said: Set to wideband stoich mode. It will still target whatever lambda you require, just it is a slightly simplified strategy compared to auto mode. Are there any negative effects by using this simplified strategy? Does the stoich mode fluctuates if lambda is around 1 like an OEM narrowband does, because of emissions? Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 1, 2021 Report Share Posted November 1, 2021 Yes stoich mode dithers 0.02 lambda either side of target. It maybe a bit slower than auto mode, but generally works well. SchuKingR 1 Quote Link to comment Share on other sites More sharing options...
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