308 1.6 HDI 2011 TURBO BOOST PRESSURE VALVE

[Sar123]

Hello I’m sort of a newbie here.
I have a 308 HDI and I was looking for the turbo pressure valve.

Basically I have loss of power and a dpf has been changed, injectors done, air mass is ok.

Only thing I could find in the forums is the filter gets clogged in the boost pressure valve.

Now I can’t find the location of this part. What I thought was a boost pressure valve sitting near the oil filter housing doesn’t have a filter.

Any help with this will be appreciated.

Thank you In advance

[RichardW]

Is this a 16V engine, or the later 8V. On the 16V, it's down the back of the block on the driver's side, I think the outlet pipe comes up to the top of the engine. Not sure on the 8V, might be the same, if it is this engine, I can look it up.

Having said that, you really need to get it on a diagnostic computer and look at some of the live data to see what the issue is. Poking and hoping can be expensive exercise in futility!

[Sar123]

Thank you for your prompt response

There are no error codes when I hook it up to a diagnostic.
I’m not sure how I tell if it’s 8 or 16v. There is no engine cover.

I’ve attached a picture of the engine

[RichardW]

That's an 8V DV6C engine. I'll look up to location of the boost solenoid later. There might not be any error codes - you need to look at the live data. Does the air flow make sense, does it increase in line with revs? Is the boost pressure rising as it should? Does it match the reference pressure? Does the reported position of the EGR valve match the requested position? Does the turbo position match the requested position? You're looking for anything out of place. Did you replace the MAF sensor, if so where did the replacement come from?

[Sar123]

Thanks for your prompt response. Just goes to show how inexperienced I am.
I haven't changed the Air Mass but when I disconnect it its doesn't make a difference (doesn't fly like a rocket).

In all fairness, the car belonged to the company and they got the DPF, Injectors, etc done at dealers. I take it dealers would have done the relevant investigation to come
to a conclusion that the DPF and Injectors need changing.

It's only my research that has pointed me to the Turbo boost pressure valve filter. Hence why I wanted to know the location of it.

I will get the live data and see if there are any differences. If it makes a difference when I 1st start driving the car its fine for a few seconds and then you can feel it go into limp mode.

[RichardW]

On this engine it looks like the boost control solenoid is just below the turbo, in front of the oil filter. It's not obvious, but it looks like the vent is common with the EGR solenoid, and the vent point is somewhere towards the back of the engine.

[Sar123]

Thank you Richard. The solenoid I have identified and removed (and managed to break the plastic male connector) was indeed below the turbo in front of the oil filter housing.
I opened the solenoid up and didn't have a filter instead it had a spring and sensor-like metal rod.

I have now ordered a new part and will fit it tomorrow and then (fingers crossed) will test drive it.

Thanks for your help. Much appreciated