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hp tuners close loop control

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Hello frinds

How can I change the air/fuel ratio in close loop control in hp tuners software without Disable the long trim &short trim is 14.4 at idle & part throttle .I want 14.7

How are you brother ,

I think at close loop mode you can't target afr other than 14.4 at us vehicles at least .

At gulf or Australia spec there is "lean cruise " feature enabled at the pcm but disabled at US vehicles .

May Andre and other experts share their opinions .


For the most part GM use a narrowband O2 sensor which means the ECU can only target 14.7:1 (stoichiometric) under closed loop conditions.

Andre if we force open loope and then dial air mass sensor can then afr target controlled ?