350-400kms per tank???

your definitly running rich, unless you have your foot to the floor all the time. And the CXi is pretty gutless, so maybe your expecting too much?

You basically need to do what ben said :

Quote:

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COULD be a bad o2 sensor or blown catylic convertor....resulting in the [acronym:06f22abd14="Engine Control Unit"]ECU[/acronym:06f22abd14] running the computer rich - using more fuel obviously.
OR could be a clogged air filter....OR bad fuel filter.....or even bad spark plugs.

"something like" a SAFC wont help - the problem lies in a sensor somewhere - check/replace each thing plus more I have described in this thread - if still using a high-amount of fuel take it to a mechanic and get your [acronym:06f22abd14="Engine Control Unit"]ECU[/acronym:06f22abd14] code-tested. IMHO , i think its because of the addition of aftermarket header + CAI + etc , which has put the [acronym:06f22abd14="Engine Control Unit"]ECU[/acronym:06f22abd14] off balance and it is just simply running rich to compensate for the larger sizes of piping etc.

Come back here when finished and tell us what happened

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Quote:

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Originally Posted by Rowie";p="106258

I get on average 550 - 600km out of one tank (40litres) with mixed highway and city driving.

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yeah thats what i get usually.

went on a honda cruise yesterday with some pretty quick hill drivin and i got 650ks till the fuel light came on. then i filled up

i got an eg5 Si with cat-back, intake and mags nothing too flash.

u should be gettin better than 500.... i think :?

Right right.. thanks guys.. Looks like i know what the problem is.. Running RICH!.. the hard part now is discovering why! hehe this should be fun.. NOT!

well...

i get 550-600 a tank and yeah mines running rich...as well
which was a O2 sensor fault and dizzt rebuilt that went wrong and sent the [acronym:8aecbf255e="Engine Control Unit"]ECU[/acronym:8aecbf255e] into crazy mode..lol

when i was running my jdm d15b i would get about 500-550 ks out of a full tank. to me it sounds like you're running way rich.

well by the sounds of it im not running rich... sounds like i got a huge problem!!!!! im like going half what you guys are saying... um.........

I've got a manual EK hatch and use Optimax and only get about 400km+ - not much over 400km with suburban dirving and a little freeway driving and don't really fang it that much...

have you got any mods to that Ek skoota?

you dont use Woolworths fuel do you by any chance? That crap always burns quicker in my car....

i'm getting roughly around 600-630 from a stock EG vti...
pretty good i think, but i did notice it drop a lil when i had an air filter on there.

Thats very bad consumption. i get at minimum 240K to ~20l (always fill up $20 only) average around 270K per fillup. ANd im running a low 12 A/F Ratio on 11psi of boost. lol. BTW i only use BP Ultimate.

im running a GLi aswell and im getting just a bit over 400 per tank
same as my friend...he has a vtir and gets abouts the same as me
but remember..this is all suburban driving