General: Engine 2.0D - Boost issue / ECM 2263

[TheGrinch]

Hi,

I may need your help,
I have intermettently the fault code 2263 with the following symptoms : With little / medium throttle, the boost build up, then suddently hardly cut, then build up.
Sometimes, the fault code doesn't appear but have the symptoms.
No limp mode.

the investigation I have made :
- replacement of the Turbo Control Valve with a pierburg one.
- I have vacuum at the enter of the TCV
- I have vacuum at the exit of the TCV (so to the turbo vane)
- I have monitored various trip with vida :

I have seen that the TCV position at idle is stick to 99%, and stay at 99% all the time when riding, except when the turbo boost "cut". It's like there is no smooth regulation, it's like just an on/off on the TCV.
The boost "cut" occur when the MAP reading is higher than the "desired boost value", but still in acceptable value (lower than 2300 Hpa), which seems to be normal.

- I have check the voltage on the TCV plug at idle, which is 14V, which correspond to the 99% open from VIDA.


My questions are :
- What is the normal value of the TCV position at idle ?
- The TCV position should change all the time, right ?
- Could be a sticky boost vane ?

Thank for your help !

[TheGrinch]

Some updates :
I have tried to monitor during some trips, see attached files :
- 1st : normal trip, with stutter/boost cut
- 2ns : with EGR Unplug

- With EGR plug OFF, the car run as smooth as normal --> I odered a new one (DELPHI) , but the problem still here

- The position signal of the EGR valve is still at 0.01V.

[Simmy]

have you set the adaption in vida to let the ecm know a new part has been fitted? i have heard from other members that there is more than one tcv fitted to the 2.0d but i have never located them on my car .try a search for the vacuum system diagram.

[TheGrinch]

Hello Simmy,

Yes I have tried the adaptation value for the EGR valve.

For the TCV, and other vaccum valve, there are 3 on this motor :
- 1 : for the air doser left (turbo outlet with intercooler)
- 2 : for the air doser right (turbo outlet without intercooler, aka by-pass for the DPF regen)
- 3 : for the turbo control

As i have bought 1 control valve, i've put it in place of each one to see if one i faulty. --> No result found.
I conclude that no one of the vaccuum valve are faulty.

[TheGrinch]

Today update,

i have monitored the turbo position sensor with the page attached, by clicking the VCT2000 icon.

I have found that the signal is only between 0.1 and 0.9V. and pretty steady to 0.7/0.8V.
And drop sometimes when the variablegeometry/wastegate open.

So, it's still between 0.5 and 5V (so no error message ? )
But I think it should move between 0.5 and 5V and not stick close to a value ?

[TheGrinch]

To end the subject and help others,

The fault was the turbo position sensor (sensor fixed on the turbo) which give a constant value...
Sensor replaced and car runs as smooth as new.

Cheers !