Skip the auto shop - Our mechanics make house calls

Q: My alternator was just replaced. Now it's whining and locking on me! Why?

asked by on

After it was replaced, now the mph shots to 110 mph when im barely pushing on the gas. It also has a loud whining/whistling noise and if i go over, what i assume is 40mph, it starts to shake and jump. What do you think?

My car has 169000 miles.
My car has an automatic transmission.

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!

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: Speedometer broken

Many vehicles uses a vehicle speed sensor or wheel speed sensor to determine the rate at which certain gears or the wheels are spinning to determine the vehicle speed. A malfunction here and take away the signal required to activate...

Q: Car starts, but doesn't shift into gear, and power steering not working.

Sometimes with newer vehicles, replacing the battery can cause issues. Some systems may need to be reset, or relearned in order to function properly. It's not that you did anything wrong necessarily, but I would suggest you ask for help...

Q: Abs light, Trac light, service vehicle light on, brake pedal sinks to floor hard to stop vehicle

During the service of these components, the brake hose bolted to the caliper is not required to be removed. If it was removed and the brake system was not bled properly, air trapped in the system can cause your symptoms....

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...