1.5T Question about WOT AFR

[PangziXin]

Hello everyone, I've encountered a strange issue while tuning my 2022 Civic recently. When I perform multiple full-throttle tests consecutively, there's a noticeable difference in the open-loop air-fuel ratio between the first run and the subsequent ones, with a gap of around 10% or more. After the first test, the air-fuel ratio stabilizes within a relatively consistent range for each subsequent test. I wanted to ask if this is normal? Could it be because the oxygen sensor hasn't reached its operating temperature? Thanks, everyone.

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[VtecSlayer]

@Jester04

 

[Jester04]

Hello everyone, I've encountered a strange issue while tuning my 2022 Civic recently. When I perform multiple full-throttle tests consecutively, there's a noticeable difference in the open-loop air-fuel ratio between the first run and the subsequent ones, with a gap of around 10% or more. After the first test, the air-fuel ratio stabilizes within a relatively consistent range for each subsequent test. I wanted to ask if this is normal? Could it be because the oxygen sensor hasn't reached its operating temperature? Thanks, everyone.

This is too general, like is the car at operating temperature before logging afr? Too many variables unaccounted for.

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