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So originally when I got the car the pedal has always been soft but the brakes would engage. Then the driver side wheel cylinder was leaking fluid so I ordered two new wheel cylinders and put both in for the rear. Right after that the pedal came back pumped it up and it was hard as a rock. I bleed all for wheels made sure no air in the system. About a week later I was driving and as I hit the pedal it went down and stopped like usual but if I pushed it a little more it would go straight to the floor again. Did it a few more times now my pedals soft again and the back brakes stopped engaging we tried seeing if there was a problem with the cylinders and we put new lines coming from the cylinders to the rest of the lines. We tried bleeding them multiple times and they would gravity bleed perfect and when we pressed the pedal to bleed them it would coke shooting straight fluid out. I haven’t leaked any fluid since and the pedal still soft but the front brakes still stop the car. I was thinking it’s possibly the master cylinder or the brake booster but don’t know wanna throw parts at it if that’s not the case.
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What is your pedal feel without the engine running?
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Without a little tougher still can go to the floor but still doesn’t get hardOriginally Posted by Sunnyledge
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I would think you need to replace or rebuild your master cylinder. A pedal slowly going to the floor, without a visible leak, points to the master cylinder.
paper mechanic
it does sound like the mc
Member
I've always been told when you bleed the brakes, don't go all the way to the floor. This may push the piston in the MC past it's normal travel to an area of the cylinder which may be slightly abrasive, causing the piston to seal poorly. I'm not sure how true this is, but makes sense.
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It's possible the MC was damaged while bleeding the brakes after the cylinder change or maybe it just went bad on its own.
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