fuel consumption again

[DragonxtCz]

hey guys, i had my car serviced he said my fuel filter was 95% blocked so he changed it, thing is it hasnt done nefing im still getting around 300kms per tank. i took off my pod put the stock one bak on and just at half tank now and its 130kms. im thinking its my ecu? does anyone know in melbourne who can re tune my car or have a look at it and finally get an answer so i can fix this problem any info will help thanks

[zco]

this is somethign benjammin would say




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[zco]

or. you can visit this one

http://www.ozhonda.com/forum/showthread.php?t=30815

and you will find this info

Hope this thread can help people with fuel economy problems. I'll sticky it for a bit and then add it to the combined sticky afterwards.



How do I workout my fuel economy / usage

Now a lot of people just go on the number of KMs they get per 'full tank' however this can vary depending on how much you fill up and how much you have left in the tank.

I use the following method to work out the fuel usage (Litres) per 100KMs (a more accurate and comparable figure due to variations in fuel tank sizes).



Steps for calculation fuel economy

1) When you fill up your tank, fill up all the way to the top.

2) Zero your trip meter and drive around as per normal

3) Once you've used up fuel (say half a tank or more) fill up again all the way to the top of the tank

4) Note how much fuel you put in this time and also how many KMs you've done.

5) Use this formula to workout your fuel consumption.



Fuel Economy (L/100KMs) = 100*(Fill up amount (L) / Distance travelled (KMs)



Example

So say you did 420KMs on 35L of fuel:

FE = 100*(35/420) = 8.01L/100Kms



What should my fuel economy be like?

Now this varies depending on your car, the condition of the engine and also the model of car you have. Look in your car manual for a rough figure (but note that these figures are usually quite optimistic).

In my 1993 Civic Si 1.6L DOHC non-VTEC car I get around 8-9L/100KMs depending on the way it is driven.



What could cause me to use more fuel than normal?

There are quite a few factors that affect fuel economy and this thread hopes to point out what things you can look at (starting from the cheapest things to inspect / change).



Tyre pressues

Having low tyres pressure creates more resistance and cause the engine to work harder. Check your tyre pressures and try running a slightly higher tyre pressure (check your owners manual or tyre packard inside the drivers door) for the correct tyre pressue.



Air filter

If you haven't checked/changed your air filter lately, take it out give it a clean and if its still OK put it back in. If however it needs replacing try replacing it.



ECU Reset

If your car has been recently serviced and is still using too much fuel, you could try reseting your ECU. Just pull out the ECU fuse for about 5 mins (or disconnect the negative terminal of your battery). When you start the car up, just let it idle for a few mins before driving off.



02 Sensor

The 02 sensor only really comes into play under closed loop conditions (ie free way driving or at idle). If your ECU is throwing a 02 sensor error code or the 02 sensor itself is faulty (you can check the voltage it should be sending to the ECU with a multimeter, depending on the AF ratio). If you know somoeone with the same car try borrowing their 02 sensor.



More to come or just reply here and i'll update..........


OR !! you can go to this page

>>>>http://www.ozhonda.com/forum/showthread.php?t=31963<<<<<



but my best bet would be something simple like your tyre pressure

[kongfu]

Good hints Zco. ppls should be aware that most of questions have been discussed before.