Hi guys and girls, first thread for me.
I have a 08 ducato 2.8jtd (power according to the engine no)
Noticed a stop off in power and increase in fuel consumption, no engine warning lights, pulls well enough to about 2700rpm then it's a real struggle to go further and can't get to 4000 underload (hightop motorhome) read up and think wastegate maybe stuck open, or could inlet manifold be clogged up?
I think I'm right in saying the brass looking bit in this picture is the waste gate? I can't move it either with the engine running or not, should I be able to?

Any advice welcome TIA

The wastegate is opened and closed by the vacuum actuator in your photo. There is post on this site detailing issues, search for 2.8jtd wastegate and you should find it - lots of info on freeing it etc. I cant post the link as I haven’t made enough posts to be allowed. Best of luck

I make no claim for specialist knowIedge. I have been browsing eLearn, and took the time to investigate the Variable Geometry Turbo with which the 2.8 JTD Power engine is equipped. (I was interested in VGTs, as I have one on another vehicle.)

It seems that it may not be as simple as, a stuck wastegate.

The 2.8 JTD Power setup does not use a wastegate, just the moving vanes in the turbine. To summarise the entry in eLearn, the control system uses the a manifold pressure sensor feeding into the ECU. The ECU drives a proportional solenoid, which in turn controls vacuum from the brake vacuum pump to control the diaphragm unit which moves the vanes.

It follows that while the problem cannot be a stuck wastegate, it could be stuck vanes. Still worth checking that the mechanism moves freely.

However there is also the possibility of a faulty solenoid valve, and its electrical connections.

To add to above, I recently had a similar issue with a Benz. It turned out to be the vacuum hose to the actuator had perished from heat and thus wouldn't hold vacuum. There have also been instances of a failed diaphragm inside the actuator.

Ian.

Correct, however non VVT engines were also fitted to the Ducato 2.8JTD
The photo posted looks like the actuator connected to the exhaust wastegate not to the vvt on the turbo. If you visit the coastal motorhomes website and search for item 500344801 it will bring up a non vvt turbo version for the 2.8 on the photos shows the wastegate exposed. According to a turbo supplier site the 2.8jtd has three turbos listed one being a vvt.

2000 - 2002 500344801 Mitsubishi TD04
2002 - 2006 500364493 BorgWarner K03
2002 - 2006 504084355 Garrett GT22V VNT

Mysteryblue said:

Correct, however non VVT engines were also fitted to the Ducato 2.8JTD
The photo posted looks like the actuator connected to the exhaust wastegate not to the vvt on the turbo. If you visit the coastal motorhomes website and search for item 500344801 it will bring up a non vvt turbo version for the 2.8 on the photos shows the wastegate exposed. According to a turbo supplier site the 2.8jtd has three turbos listed one being a vvt.

2000 - 2002 500344801 Mitsubishi TD04
2002 - 2006 500364493 BorgWarner K03
2002 - 2006 504084355 Garrett GT22V VNT

Click to expand...

The above may be correct, but it is my belief that the 2.8 JTD Power engine, type 8140.43N, is only fitted with a VGT turbo, while the 8140.43S versions are fitted with wastegate controlled turbos.

My own 2.8 JTD 8140.43S is fitted with the latter type of turbo.

The OP stated that his engine is of the "power" type, presumably type 8140.43N, hence my previous post.

If I am incorrect in my belief as stated above, please explain.

Not disagreeing with you, however the explanation is in the OPs photo.. it’s showing an exhaust wastegate