Q: Car idles rough and worse when holding brake

asked by on June 14, 2016

My car idles rough and it is worse when I have the car in Drive and I'm just holding the brake. When I start driving again it will wind out, however it will hardly accelerate. It seems like it’s almost slipping. At high RPMs, it will hold it and wait to shift. In manual shift, it will shift when I want it too, but it still has the accelerating problem. There is no misfiring. My mileage is 125,689. What is your advice on how to fix this problem?

Car idle is rough Inspection $79.99 - $89.99 Get a Quote

A few components can cause the vibration in drive. The most common causes are bad engine mounts, low fuel pressure, or problems with the torque converter or transmission mounts. I recommend having a technician, such as one from YourMechanic, inspect your rough idling issue and determine what repairs are needed.

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

What others are asking

Would a leaking exhaust manifold cause a catalytic converter code?

A leaking exhaust will cause excessive oxygen to get into the exhaust and cause the O2 sensors to detect this and will set a code for the leak. I suggest getting leak repaired and then recheck the system to see...

Battery

Hi Maurice, Thank you for contacting YourMechanic. In regards of your question about battery programming, unfortunately we currently do not provide this service. We are very sorry for the inconvenience. Questions? Check out our FAQ page, call us at 1-800-701-6230...

Car starts and then dies

The details you provided about your Impala suggest there may be a problem with your car’s charging system. What is likely happening is that your alternator is failing intermittently after it starts. This means that the alternator is sometimes charging...

Car accelarates to 3000 rpm in park or neutral.

The throttle position sensor (TPS) is most likely failing. Air leaks in the intake can also generate a high idle, but not usually this high. If you need to have this checked, have a local mechanic, like one from YourMechanic,...

Car has intermittent acceleration problems - 2001 BMW 325

There are a couple of places to start looking. The proper fuel pressure is required for good performance and a technician can check fuel pressure to see it if is low which will point to a clogged fuel filter or...

Tune-up

Hi there. Today's modern cars, trucks and SUV's are much more complex than older vehicles. As such, there really isn't a general "tune-up" service. Instead, manufacturers have created recommended maintenance service, which is unique for each make, model and year....

Slow coolant loss

Put a clean sheet of paper or cardboard under the car when you park it at the end of your day and check it the next morning for spots. You may or may not see something helpful. If not, sometimes...

Car stalling at first start, black smoke from exhaust

Hello. There are a few possibilities for why your car is stalling when you first start it. Your car’s coolant temperature sensor could be sending the wrong information to the PCM, which will cause the PCM to send the wrong...

Mass air flow sensor

Hello. The first thing that I would suggest is that you return the mass airflow sensor and get a new one. The mass airflow sensor you installed could be defective causing the same issue you were having previously. Make sure...

Related articles

A Buyer’s Guide to the 2012 BMW 7-Series
When When power, performance and luxury are at the top of your list, the 2012 BMW 7-Series is sure to be a perfect fit. From the stylish design to two length options for enhanced comfort, three available engines and two...
How Long Does a Top Dead Center (TDC) Sensor Last?
The The top dead center (TDC) sensor is the point from which the firing order is determined and the ignition system measurements are taken. The measurements are normally defined as before top dead center and after top dead center. The...
A Buyer’s Guide to the 2012 BMW Z4
BMW’s BMW’s entry in the hardtop roadster segment, the Z4 delivers the ideal combination of performance, looks, and standard comfort features. This two seater is not only classically stylish and heavy on extras that aren’t, well, extra, it’s also the...