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[Kevin Wood]

The whole intake from airbox to inlet manifold was sound as far as I could see.

[henryd]

The whole intake from airbox to inlet manifold was sound as far as I could see.

So Tech 2 is showing boost being produced but its not getting to the cylinders,its gotta be going somewhere

[joff]

Butterfly valves in inlet manifold covered in carbon 

[P6UL K]

The whole intake from airbox to inlet manifold was sound as far as I could see.

So Tech 2 is showing boost being produced but its not getting to the cylinders,its gotta be going somewhere

That's exactly it mate

[P6UL K]

Butterfly valves in inlet manifold covered in carbon 

That and the valves on that YouTube link I am yet to inspect and de-carbon this weekend - Weather depending

[martin42]

Im with intercooler,remove and check it,had 1 go on my renault 11 turbo,used to run very high boost,then 1 day it dropped to hardly anything and the intercooler was no good 

[P6UL K]

Im with intercooler,remove and check it,had 1 go on my renault 11 turbo,used to run very high boost,then 1 day it dropped to hardly anything and the intercooler was no good 

The boost pipe work is holding the pressure though, as Kevin said there doesn't appear to be any boost leaks as the pipe from the intercooler to the inlet swells up

[Kevin Wood]

I think the boost is getting to the engine. There's nothing that could be stopping it. There is just not the fuel delivery to develop more than a fraction of the available power.

[P6UL K]

I think the boost is getting to the engine. There's nothing that could be stopping it. There is just not the fuel delivery to develop more than a fraction of the available power.

ECU issue perhaps?

[andymp]

Try pressure testing the inlet. Take the hose off the outlet of the turbo amd pressure it up to about 10 psi. I found a blowing manifold top cover gasket.

[P6UL K]

Try pressure testing the inlet. Take the hose off the outlet of the turbo amd pressure it up to about 10 psi. I found a blowing manifold top cover gasket.

That sounds easier than what it probably is to do... I have nothing to pressurise it with 

[P6UL K]

*Small update...

Oil & Coolant sensors on the ECU side replaced inbetween the bloody rain showers - issue still persists.... Changed oil too as it was as runny as water, black as soot and smelt of fuel!

Will check I/C next weekend for any air leaks, hopefully will get the inlet de-coked during the week.

[Omegatoy]

*Small update...

Oil & Coolant sensors on the ECU side replaced inbetween the bloody rain showers - issue still persists.... Changed oil too as it was as runny as water, black as soot and smelt of fuel!

Will check I/C next weekend for any air leaks, hopefully will get the inlet de-coked during the week.

hmm thats a clue then,if fuel getting in the oil it isnt being burnt, does begin to sound very much like the boost sensor see the boost,ecu pumps more fuel in,but boost does not get to cylinders,ergo its leaking somewhere?

[P6UL K]

I have had the EML come on on mine in the past few weeks, always just after a night shift and a around 2.5 deg C. limp mode until i could stop turn off engine and re-start then all was fine, when i get 5 min to look at my own car i will see if anything not as it should be, must be 6K since i last did inlet manifold but i also have the copper seal on injector one to do yet (and that is a cam shaft out job) nice. it does help having a spare 2.2dti engine with only 48K on the clock in the garage for the odd part now and again

Did you get a chance to do this Joff?

[P6UL K]

Has the car had any of the following replaced...

Oil temp sensor - DONE
Ecu Coolant temp sensor - DONE
Coolant gauge sensor (if different to above) - DONE
Oil cooler (if fitted) - None fitted IIRC
Thermostat - Current one seems to be fine as the fans cut in okay

If the coolant/oil temp discrepancy could cause under fuelling, then the fault must lie there if everything else appears in order

Any other thoughts....?