Thanks everybody,
However it seems to me that my explanation of the problem was too detailed and not concentrated enough to the point.
Very concise now.
I have Castrol SRF in the system, I have slotted rotors, Padig black pads, GT3 air scoops, titanium shims, GT3 Air Scoops.
Original size Michelin PS2 tires, 19" dicks.
Nothing is leaking.
The problem is not the braking power or loss of brakes, no, the braking power is absolutely good, the stopping distance is very good, ABS is working when pushed hard. The whole braking system works perfect on tracks and on streets. THE PEDAL TRAVELS VERY SHORT, as it suppose to do, DURING ANY KIND OF BRAKING at ANY SPEED.
The problem is in what happened AFTER A COMPLETE STOP.
The car is motionless with motor running, applying moderate pressure to the brake pedal and the pedal GOES TO THE FLOOR. The same when the motor is shot.
Then pumping the pedal after it touches the floor and it became firm, but then, if we still keeping some substantial pressure, like during short stop, the pedal will surrender and go almost to the floor.
Again and very short.
In the stand still car the braking pedal goes to the floor under pressure.
This is not right, the pedal under no circumstances suppose to go to the floor.
The air in the system has nothing to do with what I’m experiencing.
If the air is the problem then the braking would be affected or the pedal would be “long” during the braking in MOTION, but the pedal is short and firm during any braking in MOTION, so it is not the air.
So something is working incorrect and should be fixed.
I need to hear from men who had such problem and fix it.
I heard that ABS might be the problem, but why?
Please don’t tell me to change the driving style; it is not in the discussion.
If you can explain why ABS is “guilty”, please do.
Thank you all.
Lev.
You need a new clutch slave cylinder... there was a workshop action where Porsche will replace these under warranty. There were quite a few '06s and a few '07s that had this bad part from a supplier. Check with your dealer and see if they can look this up.
Take a read though this - it's long, but worth it...
http://www.planet-9.com/cayman-boxster-complaints/14511-clutch-failure-registry-discussion.html
brad
Why it is a clutch failure?
Explain please.
The clutch works the same as usual, no problem at all.
Hmmmmmm, I'm sorry - for some reason I read this as you having the clutch pedal to the floor... sheeeeesh, I must out of my mind, or need to get a new brain today.
As far as your brake problem, I don't think we've heard of something like this on the board here before. We've seen this happen on track because of hot brakes. But not on the street. Especially with them working fine, then the pedal goes to the floor.
This sounds like there's a vacuum leak someplace. I'd start with the master cylinder, the lines, or it maybe the ABS controller. I hope the car is still under warranty as you suggest. I think this will be hard to troubleshoot here, and you need to have someone qualified to work in the car, take a good look.
brad
I had something similar hapen to my wife's car (nota Porsche so it may not be the same isue). It was an intermittent "brake pedal to the floor". I had it checked several times by an independent station. No Joy. Had the problem again and took it a shop that worked on Porsche, Vettes' and other performance cars and after extensive tersting they found the fault in the master cylinder (don't remember the exact diagnosis). They replaced the master cylinder and no further reoccurrence of the proble. You need to take this to the dealer and have it checked before the bad thing happens. Good luck.
Craig
