fuel consumption very high

[paxil]

Hi

I have a hyundai accent 2005 sedan (automatic transmission). Please note that the vehicle is a NON-US model.

My gas consumption is approximatley 7.3km per litre which is very high.

The spark plugs have been replaced , tires are at 30psi , and air filter is new. The spark plug cables are also new.

The obdII device does not detect any issues and the engine check light is also off.

Appreciate any feedback on what could be wrong, the mileage rate is very high and is becoming an expensive affair for me.

[rocconi]

Check that none of your brakes are dragging. Also have the wheel alignment checked.

[paxil]

Originally Posted by rocconi

Check that none of your brakes are dragging. Also have the wheel alignment checked.

Wheels spin freely. Both the wheel spin freely. I checked them yesterday by jacking the front. Wheel alignment is also fine.

[synntax_error]

rear drums do not make any noise when the wheels are spun freely?

[paxil]

Nope there is no noise fromr rear drums.

I have also changed the fuel filter and air filter. No much differnecen noted

Originally Posted by synntax_error

rear drums do not make any noise when the wheels are spun freely?

[rocconi]

My guess is either the front O2 sensor or a bad fuel injector. How is the engine power? If one injector is not putting out the correct amount of fuel the computer adjusts the other 3 injectors to keep the average correct. This can kill fuel mileage. See if the long term fuel trim is out of range.

[paxil]

Originally Posted by rocconi

My guess is either the front O2 sensor or a bad fuel injector. How is the engine power? If one injector is not putting out the correct amount of fuel the computer adjusts the other 3 injectors to keep the average correct. This can kill fuel mileage. See if the long term fuel trim is out of range.

The vehicle runs like a beauty. No acceleration problems. Engine power is awesome.

How do I check if the long term if long term fuel trim is out of range?

Can the front o2 sensor be faulty even though the engine check light is not on?

[rocconi]

O2 sensors wear out and their response time starts to increase. Also they can become biased towards rich or lean. The long term fuel trim has to be read with a scan tool since a code reader cannot.

[paxil]

Originally Posted by rocconi

O2 sensors wear out and their response time starts to increase. Also they can become biased towards rich or lean. The long term fuel trim has to be read with a scan tool since a code reader cannot.

i plugged in odb2 device and tried to monitor the o2 sensor using TORQUE Android application. the O2 sensor is shown as unavailable. Only items monitored is fuel system.