Weather changes DO make a difference in how an engine runs, especially with all the feedback built into modern EFI systems.
High humidity reduces the amount of O2 available, but also lowers octane requirements. Enough to notice...maybe... if the exhaust sensors notice a difference in O2 content in the exhaust the feedback to the ECU wil change.
High humidity reduces the amount of O2 available, but also lowers octane requirements. Enough to notice...maybe... if the exhaust sensors notice a difference in O2 content in the exhaust the feedback to the ECU wil change.