Air in brake lines

[porschedavid]

2005 Porsche 996 4s
Bleeding my brakes with a pressure bleeder.
Wife comes to get me for family emergence.,Rush in doors,When i return to car i left brake nipple undone a tiny bit and you guest it all brake fluid drained out.What is best action now as got air in abs and psm pump

[JFP in PA]

You need a Porsche specific scan tool like the Durametric system to activate the ABS/PSM system during the bleeding process to get the air out. Nothing else will work.

[OldSharp997]

Is it possible that because ABS was not activated during the inadvertent pressure draining, that the ABS portion of the circuit did not drain?

[porschedavid]

I was hoping that the abs or the psm was not drained as the valves were shut.After re filling the system the brake pedal is hard until start engine then its slightly spongy

[JFP in PA]

Originally Posted by jchapura

Is it possible that because ABS was not activated during the inadvertent pressure draining, that the ABS portion of the circuit did not drain?

The ABS/PSM control system and pump are one of the highest locations in the braking network, and where air collects when the system is allowed to gravity drain. Fixing the issue is simple, the control system needs to be activated during a subsequent bleed, but that requires a Porsche specific tool to activate it.

[OldSharp997]

Originally Posted by porschedavid

...the brake pedal is hard until start engine...

This just probably means that the vacuum in the vacuum boost system leaked down when the engine was off.

You are going to need a Durametric or to take it to a shop. If the shop is close and without a lot of potential for panic stops, you can probably drive the car there, just be careful and allow for extra braking distance in case a panic stop surprises you.

[porschedavid]

UPDATE
Filled system up again .Bled all the brakes,Took it for a long spin,brakes seem to work fine,As before