Jump to content
Ford Fusion Energi Forum

Ford Fusion Energi 2017 - Buzzing noise on EV mode?


Madevilz
 Share

Recommended Posts

 Noticed this as my wife drove the car in our driveway. Sounded like a very loud hair clipper buzzing noise. Can't be heard inside the car. When I asked my wife if she heard it, she said no. So it could have been happening for a while but we never noticed it as we are driving it. I'm 99% sure the buzz/humming can only be heard on EV mode. What can this be? 

Link to comment
Share on other sites

The only sounds I've ever noticed from ours at low speed is periodically the fluid pump and the whirring of the motor. Seems as though the fluid pump only runs at low speed or when the car is sitting still, but it's also as likely that's only when I notice it due to road noise. Can you post or link to a sound clip?

Link to comment
Share on other sites

On 5/2/2022 at 6:04 PM, theterminator93 said:

The only sounds I've ever noticed from ours at low speed is periodically the fluid pump and the whirring of the motor. Seems as though the fluid pump only runs at low speed or when the car is sitting still, but it's also as likely that's only when I notice it due to road noise. Can you post or link to a sound clip?


I was able to reproduce the buzz at Park, and pushing the brake and release. Buzz is heard after each brake.

 

https://streamable.com/ezeur2

Link to comment
Share on other sites

On 5/2/2022 at 11:02 PM, Madevilz said:


I was able to reproduce the buzz at Park, and pushing the brake and release. Buzz is heard after each brake.

 

https://streamable.com/ezeur2

 

This is the vacuum pump for the brake booster. It is a bit noisy, but completely normal.

 

As a related tidbit that's not covered much: You may occasionally hear a similar sounding noise from the rear of the car when it is completely off and sitting. You may have this happen after a decent trip using gas. The vehicle also has a gas tank vacuum/leak check that is run on occasion while the vehicle is completely shut down, usually not long after you turn it off and everything goes to sleep. This is also an expected noise.

Edited by cr08
Link to comment
Share on other sites

On the Fusion Energi, the brake booster pump, power steering pump are electric. On an ICE driven car, these systems are driven by vacuum and fluid power steering, respectively. On the Energi, the brake booster pump comes on when the brake boost system pressure gets low, this is after several brake applications. This is the buzzing noise you're hearing. The electric power steering is on constantly, while the car is turned on, it's probably silent. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...