To disable eco mode in a Ford Fusion all that You will need to do is press the eco button that is located next to the gear selector on the center console. This will disable the system and go back to the standard system. The eco mode is a different mapping for Your ECU that will improve fuel economy, but will lose power compared to the standard driving mode. It remaps the engine to use less gasoline, and remaps the transmission to shift at lower RPMs so that the vehicle does not wind up burning excessive fuel. This can be a good feature if You are looking to maximize fuel economy, but it is not the best when You are on the highway and want to go faster.
The ford fusion eco mode is not designed to be turned off. Check with your dealer or owner's manual to verify.
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