Q: Q: Getting horrible gas mileage.

asked by on

I am getting horrible gas mileage. I cleaned my throttle body and my MAF sensor three times already. I took my car to Firestone to get a diagnostic and they said my car is running better than ever. My Service Engine light is not on and I wasn't able to pull up any codes.

When you say you are getting horrible gas mileage, you do not specify how bad. If another shop says it is running ok then it may be OK. If you are getting a drop of more than 2 to 3 miles per gallon in the city then you may be having an issue that would need a thorough diagnostics of your complete vehicle to see what could be causing the problem. The brakes could be dragging, the tires could be low on air or a different size, the engine could have problems with it that the computer does not detect, the transmission could be slipping or a number of other issues that could contribute to a loss of fuel mileage. Even added on body parts or aftermarket engine parts can cause this. I recommend you have a certified mechanic, like one from YourMechanic, come and do an analysis of your problem for you.

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. Q: Getting horrible gas mileage.

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: Lost my transponder key. if i replace my ignition.cylinder do i need to program the new transponder key? 2003 Mitsubishi Galant

Hello - yes, if you do not have at least 2 keys that are already "recognized" by the transceiver, you must have the new keys programmed at a Mitsubishi service center or locksmith equipped with the proper equipment. If you...

Q: Power Steering leak from passenger side.

The power steering pump and high pressure hose is on the left side, and the steering gear has boots on both sides that could leak. The most common failure is the high pressure hose is leaking. The system would need...

Q: #4 spark plug blew out ( threads are now stripped ) and oil is blowing out the hole. Are the rings blown out ?

Motor oil can enter the combustion chamber through the valve guides, particularly if the valve stem oil seals are leaking, as well as past the rings. If there is a lot of oil, that would indicate a serious problem but...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.