Unstable return to idle when revving

[Aurega]

ye thats what I though... but I dont have anything how to make the hole for the pipe air seal... and also .. someone told me that if the membrane failed and you keep the pipe open its like to he oil cap open... so not good...

[lizzard-t]

The whole system is a block vapor recirculation valve system.
The system is designed to refine and burn block gases which are made up of air .fuel vapor and burnt gases that make there way up through the cylinder bores via the piston rings .
They get sent into the inlet manifold just before the Turbo to be atomised .

So oil mist in the inlet tract is not uncommon.
As I have said before you require someone who can record live data of the fuel trims.that way you will know if the fuel trim is lean or rich .
You can learn a lot from that
You have been to a garage or garages
But none of them have done this test .
They have just replaced parts which have not cured the issue.
Either they are replacing these parts on your findings or they are guessing.
You are no nearer the outcome,and probably out of pocket.
I'm telling you, you need to get someone with some brain cells to carry out live data on the fuel trims.
With them you really cannot move forwards .

[Aurega]

Hello,

thank you, I asked one garage, they told me that they do not know what fuel trims are...
Im trying with the second one...

I was trying myself but Im not able in torque to get these values...
Opl Monitor also dont have this or I dont know how to set PID to get the values...

Can you please advise?

[Opelduude]

What about your local Opel dealer? They should be able to guide you in some way.

[Aurega]

yea they told me "we did not find anything wrong" ... I told them, did you try it with warm engine and they said, no... with cold so I lost trust to them ....

[lizzard-t]

Opl monitor don't do LTFT. Or STFT
Torque pro does the fuel trims
Your best bet is to make sure no sensor has been removed and re-installed for learning purposes.
Your better off doing it when the car is in a closed loop condition
As that will give you an accurate response

Basically whatever the short term fuel trim is doing has to repeat the same condition about 30 times for it to become a long term fuel trim.
The base setting should be about 0%
If it goes+ then more fuel is being metered ( over fueling)
To try to over compensate for an air leak .
If It goes into - then less fuel is being metered ( under fueling)

[Aurega]

thank you, Ive tried Torque PRO but no reading there... But from the fuel presure grapth I send before, there is more fuel presure then there should in the situation where the revs bumps... so more fuel?

[.R.B.H.]

[Opelduude]

With limited knowledge and equipment you are just going in circles with this. You need somebody that can read and understand the values from the engine data.
Do you have any Bosch Car Service nearby or anyone that has a good reputation in car diagnostics?

[lizzard-t]

Exactly as above.
Also another thing is what values are you expecting to see and where have you got these expected values from for you to say there's too much fuel pressure?.
Too much fuel pressure could be a calmination of the injectors shutting down so it's building pressure .

[Aurega]

With limited knowledge and equipment you are just going in circles with this. You need somebody that can read and understand the values from the engine data.
Do you have any Bosch Car Service nearby or anyone that has a good reputation in car diagnostics?

Yes, the car where changed injectors, pressure valve and sensor was Bosch Diesel service center...

[Aurega]

Exactly as above.
Also another thing is what values are you expecting to see and where have you got these expected values from for you to say there's too much fuel pressure?.
Too much fuel pressure could be a calmination of the injectors shutting down so it's building pressure .

The light line on the picture is from the Bosch diagnostic tool where it shows how the presure should be... the bold line is current presure... from the valve...

[Aurega]

Here is video from engine bay ... https://photos.app.goo.gl/PAAG83SM3GwVijaP8

We tried Launch diagnostic tool but we were unable to find fuel trims... just pressures etc...

I will try local Opel one more time...

[Opelduude]

Get them to check the values from the throttle pedal!
On the Norwegian Insignia page on Facebook at of people had their pedal replaced under warranty on the B model.

[flusher]

please i hope next message won't be "i replaced throttle pedal assembly and still nothing"