Skip the auto shop - Our mechanics make house calls

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?

A: There is always a chance of something going...

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?

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: What is the fuel pump shutoff system?

Your car has a number of important safety features built into it. One of them is a fuel pump shutoff system. This is activated if the car is involved in certain types of impacts, and if an air bag is...

Q: Master cylinder and clutch slave cylinder replaced

Unfortunately, using the same plastic clutch slave cylinder assembly the vehicle was manufactured with will cause the same results if the vehicle is abused. The plastic part is very strong, but cannot withstand the heat and pressure from hard driving....

Q: Fuel pump problem

Hello. Code P0089 is the code for an issue withe the vehicle's fuel pressure regulator. In this instance it appears that the code refers the fuel pressure regulator mounted in the engine bay, on the vehicle's high pressure fuel pump....

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.