For the last couple of months, on occasion I have come to a stop, usaually first stop of the day, and my brake pedal falls an inch or two before any action. Slow to return also. It has been cold this winter, the 60 has many miles on it, and I'm just running her. But Thursday, on a much warmer day, it did the same thing, but did not recover. After further investigation, it has continued, and has not returned to normal operation.
When coming to a stop the pedal falls about an inch or two with no resistance or braking force. Then it begins to brake, and takes added effort. I first suspected MC failure maybe, as it is a two year old CCOT Aftermarket unit, but there has been no sign of leakage or fluid loss at all. Rear brakes seem to be working okay, although have not checked them much. Emergency brake works well, front calibers are aging, but looked good this past fall when doing knuckle job.
The one thing leading me to booster is that it is making a tad bit more hiss/whoosh sound than normal when pressing the pedal, but also makes a snorting sound when the pedal returns to neutral.
Thus far, idle and engine performace does not seem affected, good suction at nipple on intake. When disconnecting vacum, pedal just gets hard to push.
I'm suspecting that I had intermittent failure of one of the seals on the rear diaphram and now it has completely failed. I must have some assistance left, as the pedal does not feel completely dead, but the dropping before anything happens is kind of spooky, especially in an emergency situation.
Am I making the right assumptions, the hissing and snorting at the brake pedal seems to be a sign to me. Anyone try NAPA units, seem to be a fair deal, checked online, around 300 bucks. Anyone have a used booster?
Thanks, G.
When coming to a stop the pedal falls about an inch or two with no resistance or braking force. Then it begins to brake, and takes added effort. I first suspected MC failure maybe, as it is a two year old CCOT Aftermarket unit, but there has been no sign of leakage or fluid loss at all. Rear brakes seem to be working okay, although have not checked them much. Emergency brake works well, front calibers are aging, but looked good this past fall when doing knuckle job.
The one thing leading me to booster is that it is making a tad bit more hiss/whoosh sound than normal when pressing the pedal, but also makes a snorting sound when the pedal returns to neutral.
Thus far, idle and engine performace does not seem affected, good suction at nipple on intake. When disconnecting vacum, pedal just gets hard to push.
I'm suspecting that I had intermittent failure of one of the seals on the rear diaphram and now it has completely failed. I must have some assistance left, as the pedal does not feel completely dead, but the dropping before anything happens is kind of spooky, especially in an emergency situation.
Am I making the right assumptions, the hissing and snorting at the brake pedal seems to be a sign to me. Anyone try NAPA units, seem to be a fair deal, checked online, around 300 bucks. Anyone have a used booster?
Thanks, G.