Q: Car jumping when letting off gas

asked by on January 22, 2016

When slowing down in my car, or when speeding up and then letting my foot off of the gas pedal, sometimes I will feel something jump pretty hard a few times. It shifts fine, so I don't think it is the transmission.

Greetings. Your described symptoms sound to me as the cause might be a broken engine or transmission mount. Gasoline engines generate a lot of torque and the mounting system keeps the engine and transmission under the hood! A weak or broken mount allows extra movement where the engine and transmission can jerk under load or decelerating, just like what you’ve described. Have a mechanic, such as one of our YourMechanic experts, check all of the engine and transmission mounts to pinpoint and replace any mount mount that is failing.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Car slow to accelerate when in drive

It appears from the description that there are multiple issues going on with your Cadillac Catera. A blown head gasket will definitely cause both acceleration issues and white smoke emitting from your tailpipe. Before we can address the possible transmission...

Rough idle and RPM fluctuation

This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses...

I changed the alternator a month ago but the battery light came on recently and now the car won't stay on

The problem sounds like the alternator has failed and stopped charging. Your alternator should be tested to see if it is putting out any voltage and amperes to recharge the battery. You should also make sure the main cable off...

Related articles

How Long Does a Throttle Controller Last?
In In order for your accelerator pedal to actually work as you push down on it, it needs to be connected to the throttle. In older model vehicles there was a mechanical link that connected the throttle body and the...
The Best Used Cars to Buy If You’re a Wedding Planner
As As a wedding planner, the demands placed on your time are going to be significant, even if you’re only dealing with one or two couples. You need to be a master juggler when it comes to your time and...
2012 Mazda CX-5 vs. 2012 Toyota RAV4: Which One Should I Buy?
Mid-size crossover SUVs are an excellent option when you need to take several friends along with you, or bring your kids along and yet still need to keep a tight leash on your purchase cost as well as your ongoing...