Donuts

Dear Helpers,

my GS 300 TwinTurbo 2j engine (ARISTO)... is consuming Fuel like crazy.. ! ! !

i need help.. of what areas should i check or try and fix or replace..

i have already cleaned the fuel injectors.. it has helped only a very tiny bit.. but still it wasent the solution.... plz help as soon as possible.. ! !

After a full tank filling.. i travel for almost 115 km's at an average speed of 135 km/h and my Tank is Half Empty ! ! !

i know this isent normal.. soo plz help this is very importnat..

Thank you.. ! ! !

Lexusfreak

Last time you did a complete tune up? Check your tire pressures as well.

What brand & grade of fuel are you using?

The twin turbo isn't helping your fuel economy however.

Donuts

well.. the last time for a complete tune up ...?!?!?!? cant even remember when..

tyre pressures.. i didnt care about them.. cuz i am changing my tyres in a few hours. time..

about the fuel brand.. i use.. unleaded fuel.. never changed this brand.. ! ! !

well.. a person i know has a similar car like mine in all specs.. and his fuel consumption donest reach as much as 1/2 of mine..

i asked him but.. he isent really a very good guide to knowing whats wrong.. !

Sharing is Caring..

Thank you.. !
plz reply

mikeyboy

any check engine lights?

Donuts

i am sure.. no chek engine lites.. but i still chekced jst now.. nothing at all.. ! ! !

Lexusfreak

If you don't remember when you did a tune up, then it sounds like there is a good chance it's needs one!

So did you change your tires yet? Make sure they are at the correct pressures or it will cost you much in the way of fuel economy.

I know you use unleaded gas, I ment is it 'regular' grade or premium fuel......? What octane is it?

Donuts

well... i jst changed my tyres.. and made sure they are all at the same pressure.. !

i did notice a diffrence in fuel consumption another nice bit .. but agian isent a reasonable consumption.. !
from what i notice . .... i am gradualy getting there !
Hey.. Thanks to you man .. ! you doing me big favores..

now after all this ! my big assumption is and last resort to this problem.. is the engine tuning !
i hope it makes major diffrence..!

Thank you LexusFreak..! you are THE Lexusfreak,.. ! !

Lexusfreak

I'd change the spark plugs (get OE Iridiums...either NGK or Denso), spark plug wires (if equipped), air filter, fuel filter, PCV valve, adjust the engine timing & it wouldn't hurt to clean the throttle body & have the injectors cleaned......not sure how much that is going to cost you over there, but I'd be willing to bet your fuel economy will improve alot! Good Luck!

mikeyboy

does your exhaust smell different since your gain in consumption

Ronsully

check these..

- O2 sensor could be going bad causing your car to run rich.

- EGR valve is not opening and closing correctly causing poor gas mileage.

BananaGS

Lighter on the FOOT bro

Lexmex

Pull your negative battery cable. We hear stories about CL members encountering odd accelerations and MPG from time to time. This will reset your ECM.

If I remember correctly, you don't have emissions testing out in UAE (had a lot of college friends from there but if you can find someone with a gas analysis machine, it might tell you how rich or lean you are running. There are sometimes issues that arise without a check engine light coming on.

Donuts

well.. i am sorry first off all for not posting for a long time.. have been soo busy..!

welll yess i did check with a compueter.. and showed me a normal percentage..! well at least this is what the guy told me..!

i changed spark plugs, clean throttle body and injectors, i even changed the injection needle.. still nothing looks improving..!

the lexus/toyota service center here at the uae refused 2 accept my car for tuning.. because it isent gcc specs..! ! ..

i will soon change fuel filter and air filter.. but i know it doesnt contribute with a larg factor . !

how can i chek:
- O2 sensor could be going bad causing your car to run rich.

- EGR valve is not opening and closing correctly causing poor gas mileage.
how much will it improve if i fix them.. and how..
qhat about an pexi computer chip.. will it help..?!?!
dont know what 2 do.. very disappionted..! !...