Brakes bleeding problem

[felixliter]

Hi,

I’m quite new in this forum so please forgive me for stupid question.

Yesterday I should bleed the clutch, I used a tool to pressurize the break fluid reservoir (like the motive toll) approx. 1 bar.

Unfortunately I was not taking attention enough so I drained the reservoir doing the rear left caliper (Yes I know that was a mistake).
I filled and flushed all 4 calipers, no visible air but the brake pedal is not working.

Can pump some pressure but if I hold the foot pressure the pedal will go down to the floor.

Any ideas, can it be air in the ABS unit, if so where is it and how to do?

//Jonas
 

[JFP in PA]

Hi,

I’m quite new in this forum so please forgive me for stupid question.

Yesterday I should bleed the clutch, I used a tool to pressurize the break fluid reservoir (like the motive toll) approx. 1 bar.

Unfortunately I was not taking attention enough so I drained the reservoir doing the rear left caliper (Yes I know that was a mistake).

I filled and flushed all 4 calipers, no visible air but the brake pedal is not working.

Can pump some pressure but if I hold the foot pressure the pedal will go down to the floor.

Any ideas, can it be air in the ABS unit, if so where is it and how to do?

//Jonas

 

 

Welcome to RennTech :welcome:

 

First of all, there is no such thing as a stupid question.  What you have done is introduce air into the ABS/PSM control network, which requires the use of a Porsche specific scan tool (PST II, PIWIS, Durametric) to electronically activate theses systems in a special mode while bleeding the system to get all of the air out.  This is the only known way to accomplish this.  Once properly re-bled, the system will be fine.

[wizard]

Just to add to JFP in PA's answer, the pedal going to the floor is also indicative of the brake system not being sealed i.e. a leak.

You might want to look at that also.

[felixliter]

thanks, now they work fine.