Member Since: 10 Jan 2015
Location: Angus
Posts: 1201
Do us a favour. When you have a minute, post the pressure readings, again, to see whether it has a sensor problem, too. Enjoy France. Went for a job as a human cannonball. Not the right calibre.
14th Oct 2015 9:00 pm
F355GTS
Member Since: 10 Nov 2008
Location: North Hampshire
Posts: 849
DDDad - Will do Mark
14th Oct 2015 9:09 pm
DDDad
Member Since: 10 Jan 2015
Location: Angus
Posts: 1201
Re: Some urgent help please - Engine System fault
F355GTS wrote:
images below showing pressures she stationary at around 3.2 and 4.5k revs
My bolding.
I think I may have sussed the confusion. If the 3rd image was "stationary", I presume you meant on tick-over. With the actuator stuck in the high-rev, low boost position, there would be no measureable boost until the throttle was opened. Plausible?
Edit: Whoops. Didn't mean throttle. I meant go-pedal pressed. Went for a job as a human cannonball. Not the right calibre.
14th Oct 2015 9:12 pm
F355GTS
Member Since: 10 Nov 2008
Location: North Hampshire
Posts: 849
It wasn't at idle, I think similar to previous i.e. 4,100 rpmMark
14th Oct 2015 9:19 pm
F355GTS
Member Since: 10 Nov 2008
Location: North Hampshire
Posts: 849
So it appears the boost pressure doesn't show, at least at idle!.
below are some pics showing the improvements in manifold pressure and mass airflow
Mark
14th Oct 2015 9:32 pm
DDDad
Member Since: 10 Jan 2015
Location: Angus
Posts: 1201
You can see the manifold pressure is now 0.7 Bar (10.3 psi) above atmospheric, so it should be calculating some boost, but it ain't.
Unless we are misinterpreting what "Boost Pres. Act. %" actually means Went for a job as a human cannonball. Not the right calibre.
14th Oct 2015 9:36 pm
Barn1e D3 Decade
Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021
The boost pressure value on my Nanocom has always been at zero at tick over. I will take a look with high revs and when under load and report back.2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.
14th Oct 2015 10:03 pm
Barn1e D3 Decade
Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021
Just found my post on the Nanocom Forum here
http://nanocom.blackbox-solutions.com/inde...-data#5081
But it never really got answered. I will check live values again.2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.
14th Oct 2015 10:09 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20830
DDDad wrote:
You can see the manifold pressure is now 0.7 Bar (10.3 psi) above atmospheric, so it should be calculating some boost, but it ain't.
Unless we are misinterpreting what "Boost Pres. Act. %" actually means
Actuator has always read 0% on EU3 cars. Works on EU4 though My D3 Build Thread
Member Since: 10 Jan 2015
Location: Angus
Posts: 1201
So that explains the 0.00% figure. It's still surprising that, at 4000 rpm, the manifold pressure was still below atmospheric, just because the actuator was stuck We live and learn, eh Went for a job as a human cannonball. Not the right calibre.
I have known the turbo vanes to break up, so their is no air compression.
This car in question would draw less than atmospheric pressure at idle, dropped when revved initially, and generated a max of 106-107kPa...
When my turbo went and looked like this, it still produced a little boost (Based only on squashing the hose though!
Click image to enlarge
Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
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15th Oct 2015 5:02 am
DDDad
Member Since: 10 Jan 2015
Location: Angus
Posts: 1201
I suppose the pumping losses could be greater than the small amount of boost produced, still leaving a negative manifold pressure. Surprising, though. Went for a job as a human cannonball. Not the right calibre.
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it was the sat for a couple of weeks bit that pointed towards the actuator. 
We live and learn, eh 
