Quick Answer: What Are The Symptoms Of A Bad Air Filter??

8 Signs Your Air Filter Needs Replacing

  • Reduced Fuel Economy.
  • Misfiring Engine.
  • Unusual Engine Sounds.
  • Check Engine Light Comes On.
  • Air Filter Appears Dirty.
  • Reduced Horsepower.
  • Black, Sooty Smoke or Flames Exiting the Exhaust.
  • Smell of Gasoline when Starting the Car.

Can air filter affect car performance?

While a soiled cabin air filter can affect the AC system, a dirty engine air filter can cause engine performance problems. Replacing an old engine air filter can go a long way towards increasing the vehicle’s efficiency. In fact, changing a dirty engine filter can improve gas mileage by as much as 10%.

What happens if you don’t change your air filter in your car?

If your air filter gets too dirty or clogged, your engine won’t be able to suck enough air into the combustion chambers. The engine will then run rich (i.e., too much gas and not enough air). When this happens, your car will lose power and run roughly. Your Check Engine light also may come on.

How do you know if your car needs a new air filter?

Make sure you know the warning signs of a failing filter so you can have a better sense of when it should be replaced.

  1. Gas Mileage.
  2. Misfiring or Missing Engine.
  3. Unusual Engine Sounds.
  4. Service Engine Light.
  5. Air filter appears dirty.
  6. Reduced Horsepower.
  7. Black Smoke or Flames Exiting the Exhaust.
  8. Gasoline Smell.

What does a bad air filter look like?

One of the most obvious bad air filter symptoms is that the filter looks dirty. If your car is brand new, the filter will be white or nearly white. However, it is bound to become dirty over time from air contaminants, which will make the filter look brown or black.

Does a clean air filter make a difference?

A dirty air filter might appear clean but should still be replaced at the recommended intervals. A new air filter will increase gas mileage, reduce emissions, allow optimal air flow and improve engine performance.