Hi all, my name is Paul and I'm the proud owner of my first car which is a ED Fairmont on gas and petrol.

When I first got it, it didn't run on petrol at all and the cause was stale fuel. I fixed this by adding injector cleaner and premium fuel and kept clicking on petrol as I was driving to make the car go on petty.

It was rough but then it came to normal and it's running fine on both lpg and petrol.

Now my problem is it is using way too much petrol! it sometimes says like 19.5lL to 100k and reading close to that.

I'm currently ordering brand new injectors and a o2 sensor to see if it improves my fuel economy.

Any ideas what could be the exact problem though?

If it idles fine on petrol, I'd be leaning towards a dodgy O2 sensor.

Good possibility on the O2 sensor.

also worth doing is your fuel filter, Check your fuel reg is ok. if its been unused for a bit, then it could be buggered as well, hego's are worth looking at. I think you may find that the filter is stuffed and the injector cleaner has dislodged some crap making its way into the injector system clogging them/not allowing them to close properly.

Also worthwhile resetting the the ECU as well once you have changed out the parts.

I shall replace the injectors and o2 sensor as soon as they arrive in the mail and reset the ecu once I've put them in.

Where is the fuel filter though? I've just turned 17 and I'm really getting into cars but I have no clue where the fuel filter is. :/

under the passenger side of the car about ½ way along, look for a silver can shaped thing, also ask at the car shop for the correct tools to change out a fuel filter, otherwise you will strip the ends and just make a mess of it. SO much easier with the correct tools.

A flare nut or line spanner is what you need. Don't use use a shifter on the fuel lines. In fact, don't use a shifter on your car at all lol!

do a search for double open ring spanners. Google is your friend. So is the search function, when it works...