Oxygen and gasoline combine in the car’s combustion chamber to create power. An air filter sits on top of the engine to prevent dust and other contaminants from inhibiting this process and damaging essential auto parts. To keep your vehicle running smoothly, watch for these red flags that indicate it’s time for a filter change.

How to Know If Your Car's Air Filter Needs to Be Replaced

1. Strange Noises

A clogged filter restricts airflow to the engine. If the engine doesn’t receive the proper ratio of air to fuel, the fuel mixture will be too rich and leave a residue on the spark plugs.

The spark plugs ignite the mixture to create combustion that powers the vehicle; however, they can’t fire properly if there’s too much residue. As a result, they’ll produce strange coughing and popping noises.

2. Dirty Appearance

Your car's air filter is made from a pleated and layered cotton or synthetic paper material. A new filter is off-white and will darken as it collects dust and contaminants. Using your owner's manual as a guide, create a schedule for checking the filter to see if it's ready for a change.

In some cases, dirt and debris may clog the filter’s deeper layers without reaching the surface. Consult a professional to ensure you're changing the filter often enough to protect the other auto parts.

3. Sooty Exhaust

Without an adequate air supply, the fuel in the engine's combustion chamber won’t burn completely. The engine will require more fuel to power the vehicle, and unburnt fuel will exit through the exhaust pipe as black smoke or flames. The dark smoke comes with an unpleasant smell and is bad for your health and the environment.

If you need a new filter, turn to Larry's Auto Parts in Honolulu, HI. This retailer has provided Oahu drivers with high-quality vehicle parts and accessories for over 30 years. If you aren’t sure which type of filter you need, their knowledgeable team will help you find one that’s compatible with your car’s make and model. Call (808) 734-2147 to ask about their current inventory or place an order.