Greetings,
I've searched through a few threads and haven't found one that seems to match my issue exactly, so I decided to start anew.
My '93 has developed terrible spongy brake feel, where I feel resistance in the brake pedal but don't feel the brakes activate until I push further into the pedal. I had my mechanic (Don from Hilltop Auto in Daly City) check for leaks, and he found none. I had him flush the lines and it helped improve pressure just slightly, but it seems to have returned to it's previous state. The brake fluid pump has always activated frequently, perhaps before the issue developed (approximately once for every 2-3 drives I take). I'm not sure if this is pointing to a leak in the system, if I need a new master cylinder, or if it's a potential ABS system failure, but the brakes are far from having the progressive confidence inspiring feel they used to have. The pedal does not go down to the floor. The car has oem brakes and aftermarket rotors and pads, with plenty of pad left. If I brake hard enough I can still activate the ABS, but it feels a bit dull, although it always felt dull.
There was an unusual incident that occurred last year, that may be related or could be a total red herring, but I feel that it is worth sharing. In 2013, I went for a spirited drive in the mountains and cooked my brakes a bit. Suddenly a metal on metal screeching sound seemed to emanate from the wheels, so I came to a stop. I rolled a bit in neutral, and the metal shearing sound was coming from my front wheels with the brakes not engaged, and I got the sense that my brakes were super hot and something was rubbing against something. I have the sound on video, if anyone's interested. I waited for a few minutes for things to cool down, and the sound went away, the care behaved normally. It seems that it could be possible that this incident had something to do with the spongy issue, as it developed afterwards, although not immediately afterwards.
My questions are, is this a leak or an ABS failure? Does anyone have any insight as to what the terrible sound was caused by, and could it potentially be related? So far I plan to change out the master cylinder, and install ss lines. If that doesn't improve things, then I'm assuming I will need to upgrade to the costly NA2 ABS system, which I would prefer to avoid if possible. Eventually I plan on upgrading to BBK, but not until I win the lotto.
Any recommendations are appreciated,
Thanks!
I've searched through a few threads and haven't found one that seems to match my issue exactly, so I decided to start anew.
My '93 has developed terrible spongy brake feel, where I feel resistance in the brake pedal but don't feel the brakes activate until I push further into the pedal. I had my mechanic (Don from Hilltop Auto in Daly City) check for leaks, and he found none. I had him flush the lines and it helped improve pressure just slightly, but it seems to have returned to it's previous state. The brake fluid pump has always activated frequently, perhaps before the issue developed (approximately once for every 2-3 drives I take). I'm not sure if this is pointing to a leak in the system, if I need a new master cylinder, or if it's a potential ABS system failure, but the brakes are far from having the progressive confidence inspiring feel they used to have. The pedal does not go down to the floor. The car has oem brakes and aftermarket rotors and pads, with plenty of pad left. If I brake hard enough I can still activate the ABS, but it feels a bit dull, although it always felt dull.
There was an unusual incident that occurred last year, that may be related or could be a total red herring, but I feel that it is worth sharing. In 2013, I went for a spirited drive in the mountains and cooked my brakes a bit. Suddenly a metal on metal screeching sound seemed to emanate from the wheels, so I came to a stop. I rolled a bit in neutral, and the metal shearing sound was coming from my front wheels with the brakes not engaged, and I got the sense that my brakes were super hot and something was rubbing against something. I have the sound on video, if anyone's interested. I waited for a few minutes for things to cool down, and the sound went away, the care behaved normally. It seems that it could be possible that this incident had something to do with the spongy issue, as it developed afterwards, although not immediately afterwards.
My questions are, is this a leak or an ABS failure? Does anyone have any insight as to what the terrible sound was caused by, and could it potentially be related? So far I plan to change out the master cylinder, and install ss lines. If that doesn't improve things, then I'm assuming I will need to upgrade to the costly NA2 ABS system, which I would prefer to avoid if possible. Eventually I plan on upgrading to BBK, but not until I win the lotto.
Any recommendations are appreciated,
Thanks!
