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Vibration noise when cold at highway speeds


openair
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My 2014 fusion energi has been making a vibration noise the past two+ winters during below freezing temperatures. Always at highway speeds. Often when climbing a hill or accelerating with the ice producing greater than 2 bars.

 

It can be difficult to reproduce on demand as variable assist from the electric motor varies the demand on the ice. When it does occur: switching to auto, so majority of the power comes from the hvb instead of the ice, causes the noise to instantly disappear. Letting up on the accelerator or pressing it harder will also cause the noise to gradually fall off. These symptoms suggest it is either a problem with the engine, transmission or maybe the noise cancelling.

 

It only occurs in the morning when the vehicle has sat overnight in the cold.

Never omw home from work. There are no dtcs. The vehicle has had numerous inspections in this time. Including their most detailed inspection last month with no results.

 

I'm likely going to have to take at least one morning off work to demonstrate the issue. Anyone else experience similar?

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