anpo

Where's the leak? There's an o-ring I would change before replacing any more expensive parts.

Bertrand Daoust

The leak is near the o-ring or a bit higher. I'm waiting for a price for the accumulator but will definately change the o-ring first.
The PSD unit is removed from the car right now.

Thank you.

Tails

There is also a PSD bleed procedure contained in Jim Moorehouse's Technical CDs.

Tails 1990 928 S4 Auto

Bertrand Daoust

Fixed - Actualy it is fixed since June!

The old reservoir was leeking and as it contains gaz, I (and my mecanic) did not want to weld it.
As it looks not as a common problem for our car and also did not want to pay 850$ (ouch!) for a new one, I replace it with a used one from 928 Inter. Thanks guys.

I also flush the system - thanks Louis and John (http://www.928intl.com/repair/psd1.pdf) - and everything is good now.

Also, NEVER loose the screw on top of the reservoir as it will let the gaz out and ruined it!

stuartph

I flushed my PSD yesterday, 3rd time i've done it since i've had the car, very easy to do

Question, what does the adjusting bolt do, can it alter the amount of lock up ?

Bertrand Daoust

What ajusting bolt are talking about?
Did not notice one when doing mine.

stuartph

Bertrand

When you bleed from the slave in the last step, if you look below the driveshaft there is a bolt for adjustment but please dont touch it

stevedavies

Had the anti lock warning light appear after approx 100yards of driving yesterday. Digital display alternates between 'antilock off' and 'differential control off'. Checked wheel sensor resistance at ABS/PSD ECU and all 4 check out at approx 970 ohms.
Drove car this morning. At start up ( no movement of car) no anti lock warning but PSD light on. Also can hear noises from rear wheel well ( passenger side RHD). Pressing brake pedal, PSD light goes out, take foot off brake, PSD light returns. Drive car PSD light goes out, after 100 yards anti lock light comes on.
I was hoping it was going to be something simple like bad connection to wheel sensor, not so hopeful now!

928 at last

Mine was doing the same thing a couple years ago, and a flush and fill fixed the problem. It only takes low fluid or air in the system to trip the warnings.