Poor idle

[jamesdonlan]

Thank you for the replies, I feel I'm getting close to the problem, in particular can anybody tell me where this hose should connect to, it comes from the Air Intake Manifold?

[jamesdonlan]

Found where it goes, needed to take the inlet manifold back off

[AisinW]

Idling problems are very often caused by vacuum leak, followed by idler sensors or dirty throtle body. 

[ToyotaGR]

Found the small leak on the 1.2T .. 

Its on the intake duct after the maf near the high pressure fuel pump and goes to the intake of turbo charger, pre turbo pressure... 

There is A small presence of Oil indicating leaky duct.. 

 

[Viktor79]

25 minutes ago, ToyotaGR said:

Found the small leak on the 1.2T .. 

Its on the intake duct after the maf near the high pressure fuel pump and goes to the intake of turbo charger, pre turbo pressure... 

There is A small presence of Oil indicating leaky duct.. 

 

Traduza texto com a câmara

 

 

where is the leak? I can't see her

[ToyotaGR]

Its wet with a bit of Oil as you can see at the red circle 

[Viktor79]

1 hour ago, ToyotaGR said:

Its wet with a bit of Oil as you can see at the red circle 

It's normal in all cars that use a turbo, it has to do with engine oil vapors

[ToyotaGR]

Its not normal to leak out side of a sealed intake tube.... 

Oil is normal due to Oil vapors, but Oil should not escape outside of the tube, ... 

This indicates a leak on the tube with the turbo housing intake side of turbo 

[Viktor79]

13 minutes ago, ToyotaGR said:

Its not normal to leak out side of a sealed intake tube.... 

Oil is normal due to Oil vapors, but Oil should not escape outside of the tube, ... 

This indicates a leak on the tube with the turbo housing intake side of turbo 

Ok 🫡 

[solero]

If it is an air leak, surely the MAF sensor reading would vary? Have you monitored the readings?

Mines is a 1.2t cvt and idles steady at 700rpm when warmed up and in neutral, with no apparent issues (2016@28k).

Let me know if you need any readings from techstream. I will also try and take some endoscope photos of my turbo intake, for signs of any oily dust.

Keep us updated.

[ToyotaGR]

Yes mine is reading when warmed up 

1.1 to 1.2 

Quiet low service manual states 1.4 to 1.8G/s if i remember corectly 

Mine only on idle fluctuates and map sensor pressure same.... 

On idle my LGTF STFT Are +5 to +7 percent both... 

If i give 1500 rpm 0 percent perfect.. 

If i put load a/c on drops to 1 percent both almost perfect