Q: Mpg going down

asked by on

When i first bought the car few months ago it was giving 38mpg as weeks went pass by it started to get lower and recently i had breathibg filter changed and its gone to 26mpg now. What can be the cause

My car has 137000 miles.
My car has a manual transmission.

Hello. If the gas mileage has gotten worse since you replaced the air filter you will want to look into that first. It may be installed upside down or improperly. If the air filter is not the issue, then you should check the duct work and air filter housing. If there is a leak and the air pressure and vacuum levels are abnormal, the engine will be confused and run poorly. The spark plugs and ignition system can also have the same effect. When was the last time you had the spark plugs changed? You may want to do this just as normal maintenance, as it will not hurt the vehicle and can only improve the drivability. If the ignition system is working correctly, you will want to make sure your fuel filter and injectors are clean and working correctly.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Mpg going down

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 makes a smooth spinning sound when I turn the key over. Does not start. Starter bench tested green.

Bench testing a starter is not necessarily reliable because the starter is not actually tested under any load. The starter is just simply free-wheeling and that is not hard to achieve if the electric motor within works even marginally. If...

Q: I have a damaged hood, radiator support and headlight

Hello, thank you for writing in. The hood should technically fit. Some replacement hoods for the 1999 say they will not fit the 2000 model, but they should be the same. The first thing you want to do is look...

Q: Where will I locate the cabin air filter

The cabin air filter is located under the passenger side or right side of car windshield wiper cowl panel.

Related articles

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.