Bad Booster or Master Cylinder? Both??? October 06, 2009, 10:50:43 AM Hey all, This is for my 1987 Mustang GT, and the brakes are STOCK. I replaced the pads, rotors, shoes and machined the drums to get this Mustang braking decently again. Problem is that: [LIST=1]The booster makes an occasional "whooshing" sound when I depress it. Pedal is still mushy, even after multiple brake bleeding. Pedal will sometimes get firm, sometimes cycling the pedal will make that happen.Bad Booster or Master Cylinder? Or Both??? TIA:bowdown: Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #1 – October 06, 2009, 04:27:50 PM What happens if You disconnect the Booster and plug the vac line? Pedal should be hard as a rock but brake evenly and consistently If it still does funny things, then I would suspect your master. Sounds like a py booster to me though. Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #2 – October 06, 2009, 04:48:54 PM well the master is $10, and has to be removed to get to the brake boster, and you can get to in with basic tools in 5 minutes or less. I would start by swaping out the master. Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #3 – October 06, 2009, 05:22:41 PM When I did my booster. I just unbolted the master and moved it out of the way. Didn't even have to disconnect the hard lines. I had no idea they were only $10. Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #4 – October 06, 2009, 07:18:34 PM Quote from: danzajax;293912What happens if You disconnect the Booster and plug the vac line? Pedal should be hard as a rock but brake evenly and consistently If it still does funny things, then I would suspect your master. Sounds like a py booster to me though.Good idea, I'll block off the vac line and see how it feels. Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #5 – October 07, 2009, 03:42:27 AM hmm,prices did go up on them. around $30 without the $13 core. Last one I did was around $20 about 6 years ago. Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #6 – October 07, 2009, 09:09:37 AM I really hated the job of replacing the booster, almost as bad as the stat.I found the best was was just to remove the seat first to give you more room to lay down. That and some very long extensions with swivel sockets helped. Seems like the brake switch and clip was not fun.Good luck,TED Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #7 – October 07, 2009, 09:34:38 AM Agreed. Removing the booster blows. I had to do it twice because I got my replacement from the junkyard...in 100* heat. Quote Selected
Bad Booster or Master Cylinder? Both??? Reply #8 – October 13, 2009, 07:28:57 PM Bought a reman booster, seems like that is the problem. Wish me luck when I tear into it! Quote Selected
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