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Lost Power 2.0hdi
#11
(14-10-2021, 11:38 AM)richard77 Wrote:  
(14-10-2021, 11:10 AM)cancunia Wrote:  
(14-10-2021, 11:00 AM)richard77 Wrote:  This looks like the actuator I'd like to eliminate that as the problem
the other pipe end connects to another pipe via a solenoid(?) so I need to check that too.

That's interesting, what year is your 2.0HDi?
If you want to post or PM your VIN, I'll take a look at the Citroen Sedre/Docbackup parts list.

Thanx, Sent you my VIN by PM

So-if Torque app is correct, and I can get boost 0-3.9psi (@2750rpm), does that indicate that the Actuator is working atall/properly?
Or Does this indicate that it is not the turbo itself that is the problem?
It is the M59, I dont think there is an intercooler on the 90hp version

It might be something else, not the actuator itself. Split hose (vacuum line or intercooler hose), stuck wastegate, non-operating wastegate electro servo, stuck turbo solenoid, biggish hole in the intercooler, broken turbo shaft (everything else works, but turbo is not compressing air).
You cannot quite work those out just from the boost only.

All turbo-based engines will have an intercooler (1.6 and 2.0HDi), air is denser at colder temperatures and air gets hot when compressed by the turbo, so you kind of get free efficiency with the intercooler.
smile, you are alive!
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#12
I cant see much from underneath either. The turbo is (almost) visible but I cant get a hand in there. Everything looks kind of ok, no loose wires or signs of damage, but i cant see the actuator or hose etc
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#13
(14-10-2021, 01:57 PM)richard77 Wrote:  I cant see much from underneath either. The turbo is (almost) visible but I cant get a hand in there. Everything looks kind of ok, no loose wires or signs of damage, but i cant see the actuator or hose etc

My mistake (maybe I should not comment on the 2.0HDi), it looks like in the 2.0HDi the wastegate is electro servo controlled, so no hose to the wastegate. If you can access, check for splits on the hose that goes from the wastegate to the turbo.
smile, you are alive!
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#14
Shocked 
I found more info, I have a link here but it is in russian. manual
I have the english version but cannot upload here
it shows a vacuum operated wastegate valve and it says;

Connect the tool [ 1] to the vacuum pump (1).
Start the engine.
The vacuum value should be 0,9 ± 0,1 bar at idling speed (after 30 seconds of operation).
N.B. : The exhaust gas recycling valve is not linked to the air supply circuit. The exhaust gas recycling electrovalve is controlled by the engine ECU.
2.2. Turbocharger wastegate valve

Connect the tool [ 1] to the valve (2).
Apply a vacuum of approximately 0,8 bar.
The rod "a" should move 6 ± 2 mm.

But I really dont know how I can get in there. Maybe if I take the wheel and arch off
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#15
Don't know if the attached are any help..

I think the HDI Tuning guide linked earlier said something about the wheel arch?


Attached Files
.pdf   20HDi Turbo Check.pdf (Size: 96.61 KB / Downloads: 2)
.pdf   20HDi Turbo Operation.pdf (Size: 96.58 KB / Downloads: 2)
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#16
(14-10-2021, 05:47 PM)cancunia Wrote:  Don't know if the attached are any help..

I think the HDI Tuning guide linked earlier said something about the wheel arch?

yes youre right
Also I put my finger on the vacuum solenoid pipe (to the EGR),there was a weak vacuum, and I raised the revs to 1500ish, but couldnt notice any difference
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#17
I tried some tests per the manual
I put the vacuum gauge on the electro valve(snd blocked off the egr valve) and got 0.5bar at idle, and zero @2500rpm
I could only get 0.4bar vacuum on the EGR valve, so I sucked on it as hard as I could,then let go, I did not hear the EGTvalve operate
So I assume now the EGR valve is not working
I'll try again later, meanwhile if I spray brake/carb cleaner in the egr valve will that damage the turbo?
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#18
Not sure if the set up is the same on Berlingo but one of my sisters has a 2.0 HDI in Dispatch enterprise. That was down on power. It turned out to be a wire spring clip on the throttle cable where it goes into a potentiometer for throttle position. The clip had come out of it's groove and not giving full movement.
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