Skip the auto shop - Our mechanics make house calls

Q: Bad gas mileage on a 2000 Dodge

asked by on

2000 Dodge 5.2 L V8. I've noticed I get horrible gas mileage compared to what it should be. I replaced the oxygen sensor but it doesn't seem to help. Any suggestions? Do I need a new fuel pump? It has a 155,000 miles.

A: The fuel pump doesn't have anything to ...

The fuel pump doesn't have anything to do with the bad gas mileage. A fuel pump, if it isn't working right, either causes the vehicle to not be able to go to certain speed or it won't run at all. It's not going to make gas mileage worse.

Those are giant trucks and they are gas hogs. That's just how they are. But if you used to get 12 mpg and now you're getting 8 mpg, then there is something wrong. On those, a lot of times, it is the fuel injectors either need replacing or cleaning. So you might want to try my video "how to clean fuel injectors on your car" and have them pressure cleaned. If you don't have any of that equipment, you can have a mechanic such as one from YourMechanic, pressure clean your fuel injectors. A lot of times, that would fix it and you might not have to buy a new one.

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: Car misfires; crack in manifold

Hello. A crack in the exhaust manifold near the O2 sensor can cause some poor sensor readings to the computer. The crack will allow fresh air to enter the exhaust, which causes the sensor to tell the computer that there...

Q: Is it a seized motor or an eaiser fix

If you overheated the motor on your 2000 Toyota Camry to the point that you blew a head gasket and a cylinder became filled with coolant, then it could seize. I recommend letting it cool completely and then having a...

Q: i put gas in. my car and it goes rich back out

There can be several reasons for your van to go out. The fault may or may not be directly related to the gasoline that you are adding. You should have the fuel tank vent system checked and purge valve checked...

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 Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...