Engine 1.0 1kr-fe - too high fuel consumption

[ubecya]

Hello guys, this is my 1st post on yarisworld

The car is cheap Toyota : Daihatsu Sirion 2005, 1.0 1kr-fe, manual transmission, mileage 61,000 km.

The problem is it consumes almost 8l/100km of gas (30 mpg), normal consumption should be 5 to 6l/100km.

Symptoms:
* long term fuel trim = -20..-30% on idle which isn't normal
*abnormally black spark plugs (can attach photos, all 3 of them black equally)
* the software reads no diagnostic trouble codes. I use Chinese elm327 Blutetooth + laptop.
* both oxygen sensors seem ok


_____________
1. idle, warm:
http://s30.postimg.org/9n6n2cq3h/02a_idle.jpg


2. car stopped, engine warm:


3. as above:


4. driving, engine warm:


______
Any suggestions? I'm thinking of MAP sensor, crankshaft, camshaft position sensors
Will appreciate any help
BR,
Z.

[ubecya]

Hello,

The car is cheap Toyota : Daihatsu Sirion 2005, 1.0 1kr-fe, manual transmission, mileage 61,000 km.

The problem is it consumes almost 8l/100km.

Symptoms:
long term fuel trim = -20..-30% on idle which isn't normal
abnormally black spark plugs (all 3 of them)
the software reads no diagnostic trouble codes
both oxygen sensors seem ok

The engine starts and works (idle, driving) normally.

_____________
1. idle, warm:
http://s30.postimg.org/9n6n2cq3h/02a_idle.jpg


2. car stopped, engine warm:


3. as above:


4. driving, engine warm:


______
Will appreciate any help.
BR,
Z.

[jack black]

Sounds like it runs too rich.
I would check vacuum leaks, exhaust leaks, clean/replace MAF sensor.

Pozdrowienia.

[ex-x-fire]

What's the highest temp that the coolant gets to? 65*C ? If it is, then that's too cool.

[jackmilas]

Did you get to the bottom of your problem?