Hi all,

last week or so I have had a couple of restricted performance faults. First time it happened was on motorway at 70, pulled over in services and no obvious fault code so cleared faults and it was fine.

Had a chance to have a look at some of the posts on this and usual suspects seem to be things like the intake rubbers so went for a play today.

Can't replicate fault on sedate driving but did get it to go into restricted mode on the motorway if I accelerated heavily. The only engine fault being thrown though was a U0405-68 invalid data recieved from speed control.

Cleared faults and it was OK again.

I have had live values on and seem to be getting strange or no readings for bank 2. EGR2 shows no data, boost actuator shows zero, if I boot it commanded boost actuator2 goes to 100% but actual boost actuator2 doesnt move etc......

Have been under the hood and checked the intake rubber boots whilst the engine is being revved and can hear/feel no boost leaks.

Any thoughts?

Cheers,

Paul. 2011 TDV8 AB
2006 TD6 AB (Gone to Wales)

The secondary turbo change-over valve may be sticky - the original design's external linkage was problematic.
The valve can be spotted by looking directly down behind the radiator about half way between the centre and the left side.

Thanks Graeme, just trying to google pics of it so I know what I am looking for .....

Cheers,

Paul 2011 TDV8 AB
2006 TD6 AB (Gone to Wales)

I think the EGR readings are a bit of a red herring sir as the 4.4 only gets one EGR because of the sequential turbo's...

https://www.fullfatrr.com/forum/topic49556.html?highlight=csov

Thanks for the info CTC

Thnaks Graeme, thats awesome. I spent an hour on google last night and couldn't find anything, including on this site loads of 3.6 posts but no 4.4's so thats brill

Cheers,

Paul. 2011 TDV8 AB
2006 TD6 AB (Gone to Wales)

LTB 00504 v3 dated 18th February, 2013.
details the problem and fix.

Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Thanks Mike - I have googled that reference from one of your other posts but nothing comes up - don't suppose you have a copy of the TSB?

Cheers,

Paul. 2011 TDV8 AB
2006 TD6 AB (Gone to Wales)

Paul,
I have got a paper copy of it, but unfortunately no scanner.
I will add photos of each page and hope you can read it.

That's perfect thanks

Paul. 2011 TDV8 AB
2006 TD6 AB (Gone to Wales)

If it helps, mine is a March 2011, build date and it was fitted with the old design with the nut.
They tried to free it up, but it kept sticking, so they replaced it with the new design.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

I've checked and mine does have the nut, am dribbling oil on it during the course of today so will see if it makes a difference. Hoping this is the problem but need to try and isolate to be sure, I am guessing the difference in readings on the bank2 boost live values is the give away but we will see

Cheers,

Paul. 2011 TDV8 AB
2006 TD6 AB (Gone to Wales)

I think I would be tempted to take the nut off, then give a good squirt of WD 40.
It only moves a fraction of a mm.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

mm289,
if you take hose that goes from intercooler to throttle body then valve can be reach from above. aplay external vacuum and see if it moves, you can help with your finger to if it is stuck.

Cheers, Nino  2011 TDV8 AB
2006 TD6 AB (Gone to Wales)