When a vehicle is not in motion, there should be little indication that the vehicle is on aside from minimal engine noise. So, when a driver experiences vibrations and the occasional revving-up noise while they are stopped, this means trouble. This scenario, more commonly known as rough idling, can occur for a variety of reasons. Yet, no matter the cause, repairs are almost always necessary to correct the issue.  

Clogged Filter

Within the engine is an air filter that is designed to function similarly to the air filter in your home, in that it helps keep dirt and debris out of the engine. Just like the filter in your home, as the buildup increases on the filter, it must be replaced to remain effective. A clogged filter is no good.

When the filter is clogged, the excess debris makes its way into the engine, which can lead to a rough idle among other issues. If you catch this issue early, a quick filter replacement should be all that is necessary to solve the problem. 

Fuel Injector Buildup

The fuel you put inside your vehicle does not just stay in the gas tank. To power the vehicle and ensure it is performing efficiently, the fuel must pass through an injector. When there is a buildup of dirt inside the pump from normal wear and tear, this debris attaches to the fuel and makes its way into the engine, where it can impact the engine's function. 

Unfortunately, in many newer vehicles, you cannot clean the injector on your own. You will need to take your vehicle to a repair shop to have the injector filter cleaned. Once clean, however, in addition to a smoother idle, you should also see an increase in fuel efficiency. 

Aged Carburetor

While newer models rely on fuel injectors, older vehicles rely on a carburetor. If your vehicle is older, this part might be to blame for the vibrations you are experiencing. Over time, the fumes that naturally pass through the carburetor can cause deposits of carbon to collect along its surface. 

When in excess, these deposits prevent the carburetor from working as efficiently, which can lead to rough idling. The greater the depth of the deposits, the harsher the idle. Sometimes, these deposits can be cleaned, but sometimes the better solution is a replacement. 

If you do not know exactly why your vehicle has a rough idle, there is no need to worry. A repair professional will be able to properly diagnose the issue, so be sure to take the vehicle in as soon as possible. 

Contact a local vehicle repair shop to learn more.