Excessive fuel/gas consumption

[jughead0691]

Hi there,

I have a 1990 ST184 Celica coupe that has suddenly developed a excessive fuel consumption problem. I went from 600km per tank to 380km per tank. I have replace the spark plugs and leads, Air filter and oxygen sensor. I have checked and adjusted the ignition timing. The questions I have are as follow:

1. Would a faulty coolant temp sensor (Not the gauge sensor) be the problem & if so how do you test it.
2. Fuel injector rail pressure regulator be at fault
3. Faulty injectors (I don't think this is the problem - I have never seen all four injectors fail at the same time)

Any help would be greatly appreciated.

Many Thanks,

Jughead

[CJCride]

First I thought was maybe because your Celica is on the Bottom of the Globe all the fluids are leaking out when you sleep.

My second thought is maybe a vacuum hose has sprung a leak, they should all be replaced {quite cheap}.

Keep er Rollin.

[CJCride]

Originally Posted by jughead0691

Hi there,

I have a 1990 ST184 Celica coupe that has suddenly developed a excessive fuel consumption problem. I went from 600km per tank to 380km per tank. I have replace the spark plugs and leads, Air filter and oxygen sensor. I have checked and adjusted the ignition timing. The questions I have are as follow:

1. Would a faulty coolant temp sensor (Not the gauge sensor) be the problem & if so how do you test it.
2. Fuel injector rail pressure regulator be at fault
3. Faulty injectors (I don't think this is the problem - I have never seen all four injectors fail at the same time)

Any help would be greatly appreciated.

Many Thanks,

Jughead

I think you misspelled Australia on your sign in tab.

[fiynix]

yer it could be a fuel leak.
can you smell petrol or have you noticed if you fill up one day and the next morning the fuel gauge is a lot less then the last time you drove the car?
or has moved since the night before?

as cjcride has said check your vacuum hose.

[franchise23cc]

post the fuel hose on engine compartment. mine had gotten a tear in it and was leaking a good amount and replacing it made a huge difference. i have a nitrous setup tho and my stainless steel braided hose had been rubbing against somethin which caused the hole so might check there