Skip the auto shop - Our mechanics make house calls

Q: Car idles rough when in gear

asked by on

My car idles rough when I put it into gear, and it sounds like it is about to die, especially when not fully warmed up. Turning the AC on makes it worse, and when I come to a stop.

A: Hello. If the idle is that low, then it can...

Hello. If the idle is that low, then it can be caused by a number of things. Most of the time it is caused by a vacuum leak or a dirty throttle body. The throttle body being the most common. I typically clean the throttle body first to see if it clears it up. If it does, then the problem is solved. If not then the issue may be from dirty fuel injectors or it may need a tune up. If you need to have this diagnosed, consider YourMechanic, as a certified mechanic can come to your home or office to locate the cause of the rough idle and make the necessary fixes.

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

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 cranks runs for 30 seconds then shuts off

You should have the vehicle scanned for codes to see if the theft system is not allowing the vehicle to stay running. Another possibility is that your fuel pump may not be getting power in the run position of the...

Q: 1997 Honda CR-V cranks but won't fire. Changed fuel pump it ran for a few days. Then would crank and not start. The next day it st

Hello, thank you for writing in. If the issue seems to be fuel related, you are going to want to run some more tests, but they must be done when the vehicle is acting up. When the vehicle will not...

Q: When the AC is turned on my Check engine light comes on , code reading throttle position sensor, not enough voltage.

If you have the electronic type throttle that has no cable to the throttle body, then you will need to check to make sure that battery voltage is not dropping below 12.5 volts when your A/C is turned on. You...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...