R32 S@#t House Fuel Consumption

[Drift Freak]

Hi guys,

After alot of scanning the forums without to much success in direct relation to what i'm looking for. I'm just gunna post my own and see what happens.

I've got an R32 RB20DET with the following mods:

- HKS 2540 turbo

- Apexi Power Fc AP Engineering Computer w/tune

- Full 3 inch Turbo back exhaust

- CAI but no box or shroud

- Standard injectors and airflow meter

Now my problem is my fuel consumption its like I fill up to the brim and no more than 260km later the bloody fuel light comes on WTF???

When I had it tuned the tuner told me that he wasn't totally confident with the Apexi Power FC but he'd done a few before with no problems. I run the E10 ethanol blend most of the time (but I've put Optimax in it before and only an extra 50 km per tank) would this explain the crappy consumption. The tuner told me that the A/F across the rev range was good but I'm really starting to wonder as there is heaps of black fuel spray over the arse of my car within a few days of washing it. How much can a stuffed O2 sensor affect my consumption??

Any ideas would be gratefully appreciated as its startin to really shit me and costing me a motsa.

Cheers

[STATUS]

needs a retune.

[Bennett]

O2 sensor can make a big difference but if the car is tuned for fuel consumption the you dont even need one.

The car should always be running on 98 octane. Dont go less or it can be bad for your engine depending on the tune. and 50km's extra is a fair bit too.

Did the tuner just tune for a safe full power run or did he tune for fuel consumtion while not on boost aswell?

You should be getting at least 450km to a tank with a well tuned power fc.

Its worth paying someone who knows what they are doing because you will make the money back saving on fuel.

Also do you have a cat or has it been bypassed. If you still have the cat and your cars getting black after a few days then its running too rich therefore wasting fuel.

Hope that helps

[Drift Freak]

Thanks guys,

I thought as much. I've rung around and the average is about $500 if there's no hidden gremlins. At the rate I'm travellin it won't be long before i make that money back and I've got a Z32 airflow meter and hopefully some injectors so a new tune will be needed anyway.

Thanks guys

[fatz]

guy who tuned it probably left the closed loop off

[The Mafia]

300 - 350kms out of a tank of 98 fuel is about right for a high powered skyline.

260 for E10 probably because it is simply shit fuel.

Get a decent retune and I bet you get better fuel economy too.

[ashneel]

hmmm thats strange. with the mods listed in my sig i get 500ks out of a tank400 if im giving it hell

needs a tune man. mine is still running a tad rich as i too have fuel spatter and unburnt mark in my rear end so next service will get a quick tune.

[Bennett]

Yeah i get similar. 550 like a grandma and 400 when the accelerator cops it