Skip the auto shop - Our mechanics make house calls

Q: Car producing loud hum when accelerating, engine stalls before starting up

asked by on

Hello, during an oil change I was informed that my serpentine belt was almost due to be replaced. They told me that if the car started to make squealing sounds, I would definitely need it replaced. At the time I wasn't prepared to pay to have the replacement done so I told them I would have it done another time. I'm not sure if the noises I hear now are from the serpentine belt, but when I accelerate, it almost sounds as though the car is missing a gear and hums (almost like an airplane). Trying to go from stopped to going uphill also produces sounds...but it is more of a squealing than a hum. I am more than willing to get the belt replaced, but I'm wondering if it is the same problem. Turning the car on sometimes takes a minute or two before the engine rolls over to start (battery has just had recent maintenance). Any advice is appreciated

My car has 78000 miles.
My car has an automatic transmission.

I believe the humming sound you are hearing could be related to a faulty wheel bearing. When wheel bearings dry out they will begin to make humming or growling noises when the vehicle is accelerating.

I would recommend having your wheel bearings inspected by a qualified mechanic, such as one from YourMechanic, to determine the cause of the humming sound.

As for the squealing sound, this could very well be the serpentine belt. I would recommend having that replaced as well if it is making noises or has cracks in it.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Car producing loud hum when accelerating, engine stalls before starting up

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have an oil leak and my engine sounds rugged. What's wrong with my van?

I believe that the oil leak and the fuel problem are separate issues. The oil leak could be your oil filter, oil pan, or drain plug if it is leaking under the vehicle. I would recommend ensuring that the oil...

Q: How do I properly wear a seat belt?

Seat belts are extremely important safety features, that can save your life in the event of an accident. However, seat belts should always be worn properly, or else the full extent of their safety features may not be utilized. When...

Q: AC blowing hot air in 2010 Nissan Rogue

Hi. Usually, the cigarette lighter fuse blows because the accessory (such as a cell phone charger) draws too much current. I would check the fuse. According to the wiring diagram, it should be fuse #19, which is rated at 15...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.