Q: After fuel pump replacment, car uses more gasoline

asked by on

My car has 25,000 miles and the fuel pump went out, so I had it replaced. Now the car seems to be using more gas than it did before the replacement. To explain: the dots on the fuel gauge move down quickly, but the gauge itself still indicates that the car is getting 25-26 mpg. It just isn’t making sense. I have driven my car for several years and I am always aware of how much gasoline that my car uses and recently it is literally drinking it. Before I call the service center, can you tell me if this sounds like this might be a problem resulting from the fuel pump replacement?

There is always a chance of something going wrong with a repair, but let’s not start there. There may be a new concern, such as a vacuum leak or a sensor causing false readings. Since there was a recent repair, start the diagnosis by double checking the work, and if there are no faults found, the next step would be to check the engine seals and electronics. If you would like this checked for you, a local expert from YourMechanic can come to you to inspect the perceived decrease in mileage in order to have this resolved.

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. After fuel pump replacment, car uses more gasoline

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: Engine stumbled, reduced power/speed, & warning light on

Hi there. This can be a coil or a number of other things. Since the check engine light came on the computer needs to be scanned for codes. I typically scan it first to see what is going on. From...

Q: I would like to collect brake pedal position information from my OBD2 port. Can this be done?

The brake pedal position does not have a specific wire to the OBD2 connector that can be monitored. You could however monitor the data stream and get the brake on or off PID in the data monitoring. The PID will...

Q: Check engine light came on and car stopped

A failure such as this could be due to the fuel pump failing or essential sensors such as the crankshaft or camshaft position sensors failing. It is likely that diagnostic trouble codes have been recorded by your vehicle's PCM (powertrain...

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.