Q: Excessive fuel consumption

asked by on December 01, 2016

My 08 accord lx comsums alot of fuel the fuel trim is very high. I have changed the oxygen sensors, the pcm, the catalyst, complete exhauste,spark plugs. I get only 110miles with 35liters city driving. The car is in nigeria

My car has 242005 miles.
My car has an automatic transmission.

Hello. An excessively high fuel trim and decrease in fuel efficiency can be caused by many things. If you have already replaced the aforementioned components then I would move on to examining the vehicle’s engine management system. The fuel trim is adjusted by the computer, which receives its input from a series of sensors on the engine. A few sensors I would look at are the coolant temperature sensor, the manifold absolute pressure sensor, and the mass airflow sensor. All three of these sensors play an important role in fuel and timing calculations, and a bad signal from any of them may cause the computer to send the incorrect amount of fuel to the engine, resulting in your excessively high fuel trim and decrease in efficiency. As these sorts of issues can sometimes be difficult to diagnose, I would recommend having a professional technician look at the vehicle.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Coolant leak.
The cooling system needs to be checked for leaks. Look for areas where there is a white buildup from coolant spray that has evaporated. A pressure test of the cooling system needs to be performed to see where the leak...
on/off humming sound over 65mph
A "humming noise" while driving at speed can be caused by tires or wheel bearings (https://www.yourmechanic.com/services/wheel-bearings-replacement). If you drive with the window open and you hear the noise outside the car, like the sound bouncing back at you from a...
Transmission shifts early
Hello. If the fluid is really dirty and if its integrity is broken down then it can affect the shifting. There are also other parts of the transmission control that can cause this. It can also be caused by a...
Wrench light on dash after tune up and throttle body cleaning.
Hello there, many faults will cause the wrench light to be seen in your 2010 Ford F-150. When the throttle body was cleaned (https://www.yourmechanic.com/services/clean-throttle-body) if too much cleaner gets on the throttle body sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement) or into the throttle motor,...
The AC/heat blower fan - 1997 Dodge Avenger
Hey there. The most common failure where the fan only blows on high is the blower motor resistor (https://www.yourmechanic.com/services/blower-motor-switch-replacement). It is possible the blower motor switch (https://www.yourmechanic.com/services/blower-motor-switch-replacement) is the culprit, and it can be replaced separate of the control module....
Where is the block heater cord located
The block heater connection if equipped is behind the front Ford emblem. Just flip it toward the passenger side to open the power port.
My car has an aux port but no aux button to switch
If there is no aux button, it is possible that the aux begins automatically when it is plugged in. You might also look for a source button.
Where is the variable valve timing solenoid located on a 2007 kia optima with a 2.4l enging? I am unable to find a diagram.
This part is normally located behind the timing cover and is mounted to the camshaft. It is possible that the timing belt will need to be removed in order to access it.
I have a 2003 Nissan Altima and it running bad and when it stops or is idle it will some time cut off.
The suggestion that it sounds like a diesel is a little scary. before you try anything else, be sure to check the engine oil. After that, check under the hood for vacuum lines or any other air fittings that may...

Related articles

The Best Used Cars to Buy for Families
If If it’s time for you to search for the top used cars specifically for families, check out the list we’ve put together of the top five. The list of must-haves Typical items that families are looking for in their...
The Best Used Cars to Buy for Dog Owners
Dog Dog owners are a special breed of drivers. When they shop for a used car they have a list of requirements that can be quite different from other drivers, which tends to make the process a bit of a...
The Best Used Cars to Buy for Teenagers
If If you’ve decided that you’re ready to purchase a used car for your teenager, then you’re probably pretty picky about what you’re looking for. Likely affordability, safety, and fuel economy are high on the list. With that said we’ve...