Skip the auto shop - Our mechanics make house calls

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.

A: When you say you are getting horrible gas m...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: 2006 Mitzubishi Galant suddenly goes into a lower gear while driving 40-50 mph.

Unfortunately the age and the high mileage of your Galant may be playing a heavy hand with what you are currently experiencing. Based on the symptoms provided, the shift to lower gear may be due to low or dirty fluid,...

Q: Car alarm keeping car from starting

You will have to put the key in the door lock and lock/unlock the door manually with the key. Turn the key to the unlock position and see if the alarm stops sounding. If this doesn't work, you may have...

Q: Motor overheating

Hi There, It sounds like you have covered almost everything except for the thermostat. The thermostat regulates the flow of the coolant in your car's engine and controls when the coolant flows in and out of the motor from the...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.