My new 406 project....

[GingerMagic]

Hi Ben, not sorted it yet but I have been making progress.

I had an auto elec chappie come round and he checked the wiring from the MAP to the ECU and although I have a P0235 message, there was no break in the wire.
I have also redone my vacuum pipes ( again ) so there are no retrictors and just one pipe to servo with a 'T' piece for the turbo - it seems I have sticking vanes so I'm driving to FCS in a low gear at high revs....

On the positive side, I've painted my interior....




I've since hoovered the car out for the 3rd time since I've owned it and cleaned the engine bay.....


I'm still really happy with the car, just need to sort the power issue.....

[dirtydirtydiesel]

Nice job of the lower dash panels Ginger, engine bay is far too clean too

[fattail95]

Looking really smart that, very well done! Really impressed with the painted lower dash panels, a great colour match. I don't know whether you've seen my thread about graphing PP2000 logs, if you send one my way I will graph it for you and it will be much easier to identify the fault that is occurring? I've also released a public version so if you're feeling confident you could now convert your own logs.

http://406oc.co.uk/viewtopic.php?f=5&t=24100

[Doggy]

That looks amazing Kelv, well done!

Don't think I'll be parking mine nearby.

[jonsowman]

That does look excellent, I look forward to examining it in person at Pugfest

[GingerMagic]

Don't look too close, it's a spray job that only Stevie Wonder would be pleased to see.......
Thanks for all the compliments though.....

[GingerMagic]

Another year, another MOT - passed with flying colours, no advisories....

[Doggy]

You can't argue with that - how much did it cost you again?

[GingerMagic]

Another update...

I've sort of added a Boost gauge and a Vacuum gauge so I can monitor whats going on in the engine bay while I'm driving ( still haven't found this ruddy fault... ) and there is enough pipe to monitor the turbo or swirl or the servo feeds


I've since refitted the vents and although it looks a bit Heath-Robinson it will do for now until I get around to tidying it up...

It seems the vacuum from the turbo solenoid to the turbo drops to 0 when I floor it ( effectively closing the vanes ) , but increases nicely if I throttle gently which opens the vanes as it should..

My new Brembos are being refurbished by me ( not without issues I might add ) so they are next on the list...

On a positive note - here is my best MPG figures so far, the picture was taken at Tewkesbury Morrisons after a 100 mile drive - not bad for a fettled 2.2Hdi

[Doggy]

Correct me if I'm wrong, but doesn't the vacuum to the turbo have to be dumped to increase the boost? - The more vacuum you have at the turbo, the lower the proportion of the exhaust gas that is directed to spin the turbine.
Having said that, I realise it does have to crank the vacuum back up once the boost pressure reaches the target value, (which I guess you can read of PP2k if someone else is driving).

[GingerMagic]

Hmmmm, you've got me thinking now....
I think that the vanes are closed at rest, I.e. engine off. When the engine is on tickover then the gauge reads -200 which I guess means it's active or poised. The vacuum increases up to around -400 ish to fully withdraw the diaphragm and axle which I assumed was opening the vanes to prevent over boost..?
Maybe the vacuum is fine and my turbo is goosed, but I can hear the vanes click back into place when I use a hand held vacuum pump to withdraw the axle...

The saga continues.....