24-06-20, 09:02 AM
Classic air in the system, symptoms. ABS systems can be a bit of a pain at times, as they're more susceptible to micro air bubbles, because the fluid goes through more pipework with 90* angles, through a modulating pump and the amount of pumping required to bleed the system is a lot more.
Many who bleed them, do so too fast, which agitates the fluid and encourages micro bubbles to form, which get caught with the longer system and over time turn into larger bubbles giving you spongy feel at the lever. As mentioned things like discs wear/warp will also give you similar symptoms, as can sticking pistons, which allows the pads to twist and flex giving you the same feel.
A quick check of the discs, pads will rule out the above, and point you towards air in the system. It is possible you've got all of the above, so a good brake service by someone or yourself who knows what their doing, will sort the issue.
Many who bleed them, do so too fast, which agitates the fluid and encourages micro bubbles to form, which get caught with the longer system and over time turn into larger bubbles giving you spongy feel at the lever. As mentioned things like discs wear/warp will also give you similar symptoms, as can sticking pistons, which allows the pads to twist and flex giving you the same feel.
A quick check of the discs, pads will rule out the above, and point you towards air in the system. It is possible you've got all of the above, so a good brake service by someone or yourself who knows what their doing, will sort the issue.
Later