Why Does My Car Sound Like a Lawn Mower When I Accelerate?

A loud noise coming from your vehicle when you accelerate, particularly one that sounds similar to a lawn mower is most likely due to an exhaust system leak.

The exhaust system, located on the underside of your vehicle, is responsible for processing your vehicle’s emissions, reducing the amount of pollutants released, and minimizing engine exhaust noise and force.  Engines produce dangerous gases as a byproduct of the combustion process which is why it imperative for your vehicle to have a properly functioning exhaust system.

An improperly functioning exhaust system can affect both your vehicle’s performance and your ability to drive, which is why it is important to have your exhaust system maintained at regular intervals.   A proper maintenance service should address all components of the exhaust system including the exhaust manifold, front pipe, downpipe, catalytic converter, and muffler.  Signs that you may be in need of an exhaust system repair can include sharp odors or a feeling of drowsiness while driving which may indicate a leak of noxious fumes into the cabin of the vehicle, sounds such as rattling, or a loud “lawn mower” type noise when accelerating due to holes or cracks in the exhaust system caused by rust or corrosion which can lead to an exhaust leak.  

Exhaust noise, such as a “lawn mower” type sound should never be ignored because it may indicate an exhaust system leak which can release carbon monoxide into the cabin of your vehicle and negatively impact your health and well-being.  Exhaust leaks are often a result of corrosion which is why it is imperative to have a trained automotive profession routinely inspect all components of your exhaust to determine the source of the leak and repair the damage.

At Wilton Auto and Tire Center, we always recommend routine maintenance on your exhaust system in order to ensure your safety and prevent you from having to replace the entire exhaust system in the future.