Skip the auto shop - Our mechanics make house calls

Q: Car is jerking forward when car is stopped with brake applied.

asked by on

When I go to stop, my car revs up and jerks forward on me. I have it in drive and if I pumped the brakes, it really jerks me forward. I have my foot on the brake the entire time. It's scary because I've almost hit someone. Thank you

My car has 59266 miles.
My car has an automatic transmission.

A: What you are describing is a real safety co...

What you are describing is a real safety concern. You should have your Mustang’s brakes checked out right away before you drive it anymore. It sounds like there may also be an idle control issue that is causing RPM’s to increase. A vacuum leak under the hood can cause increased idle speed. The power brake booster is a component where the engine vacuum and the brakes systems meet. I recommend having an experienced technician, such as one from YourMechanic, inspect your car’s jerking problem in order to have the correct repairs done.

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!

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: Car shifting high when foot on gas pedal

Transmission sensors are usually just to measure vehicle speed and sometimes rpm. I would think that a hydraulic or mechanical  transmission issue would be a more likely cause considering the symptoms. I would first start by checking the transmission fluid...

Q: Steering wheel vibration when braking

Most likely, your tires and/or wheels are out of balance. Balance problems are typically most evident at speeds above 45 miles per hour. A professional can inspect your vehicle to determine if this is indeed the issue. If it is,...

Q: Non stop jerking when gas pedal is pressed to floor

Hey there, thanks for writing in about your 1999 Ford Escort. You may have to have the vehicle checked for misfires. You could have a bad coil pack putting out weak spark or the fuel pressure is low. It would...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...