Loses power and humming sound coming from the back of the car

Hi,

Is there anything you can do to change the pitch of the sound? Does it seem like the noise could be the fuel pump? Are there any strange odors after driving that could indicate a brake hanging up?

Based on your description, I suspect it is related to the fuel pump. What I suggest is to check it for pressure to see if it is weak.

Here is a link showing in general how to test fuel pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Because this vehicle wasn't introduced to North America until 2009, I don't have the specifications for fuel pressure on a 2004.

If the fuel pump is weak and losing pressure, that could be the power issue you experience. Also, they can make a humming noise as well.

Let me know what you find or if you have other questions. Although I don't have the specifics, I will try my best to help.

Take care,

Joe

Hi,

The fuel pump is in the fuel tank, so that could be what you are hearing. If you leave off the throttle when hearing it, does the sound change at all?

Let me know.

Joe

Hi,

Is it loud enough for you to record with your phone and upload for me to hear? What I'm thinking is the pump because of the power loss. However, it could be a bearing. Do you notice any change in the pitch when turning?

I'm sorry for so many questions. It's tough not being there to actually hear it. I hope you understand.

Take care and let me know.

Joe

If you notice a change in sound/pitch, it very possibly could be a wheel hub bearing. When they start to go bad, they can make a humming sound. When you turn, the vehicle's weight is distributed differently. For example, if you turn right, more weight is pushed to the left side of the vehicle and taken off the right side.

So, if it was to get quieter when turning right, that would indicate the right bearing is the likely cause simply because there is less weight on it under those conditions. Does that make sense? LOL

Let me know if you notice a change when turning now that you are more aware. Also, a recording may help. Finally, let me know how the pitch changes (louder or quieter) when turning in a specific direction.

Take care and I'll watch for your reply.

Take care,

Joe

That sounds like a wheel bearing on the left side. If the sound is coming from the rear, it is likely the rear hub bearing.

This model wasn't offered in the US in 2004 so I have nothing in my manual. However, if you take a look through this link, it explains how a hub bearing is replaced.

https://www.2carpros.com/articles/bearing-hub-replacement

I looked up a hub bearing for the rear of your vehicle, and these directions will certainly help. The procedure will be very similar.

Let me know if this helps.

Take care,

Joe