Hello
I hope I can find some help here. The car is a Skoda Octavia 2.0 petrol, APK engine, basic ABS Mk60 (no ESP, no brake
The symptom :
1) Engine switched off : the brake pedal is pretty soft. It can not pumped to hard, always remains soft.
2) Engine started : pedal will be light/easy, almost go to the floor, there is still no definitie "bite" point
3) Engine switched off agaian : after 2-3 press on pedal it became hard as a good brake, but with further depresses we get to point 1)
I've made a short test on the street and the car has a good brake effect even with this condition. The ABS unit worked and activated in at heavy braking.
Before these symptom these parts were replaced :
- new rear calipers, new rear pads and discs
- new front pads
During the repair the ABS unit was replaced from a working vehicle as the original was tested but became faulty. With the "new" ABS unit nothing changed.
I noticed a crack on the vacuum pipe, it was replaced.
I've closed the outlets of the master cylinder with plugs : the pedal became hard as it should be. After that I closed the outlets of the ABS unit : the pedal still hard. The fault is after the MC/ABS
The calipers moving freely, no sticking, so the pistons. There is no leaking at the pipes or connections. The system was bleeded hundred times with pressure bleeding, no more air bubbles coming out.
Then I pinched the two front brake hose and the pedal became harder, but I can not find any fault on the front brakes.
I know that the brake circuits work diagonal, so I will pinch the LF/RR and RF/LR hoses.
What else should I check ?
