Brake problems, pedal is spongy

FloridaStang · November 5th, 2011, 06:08 PM

I bought a set of cobra calipers and put them on the other day and bleed them and the pedal was still mushy, in the process i sucked air through the master cylinder and had to bleed all 4 corners. I bled each wheel RR, LR, RF, LF. in that order and didnt see anymore air in the clear line. Couldnt figure it out and the mechanic at the shop i was at said he though the calipers where the problem so i swapped them out and put my old ones back on and still couldnt get it to work

so now im still stuck with stock calipers and rotors and now they dont work either, i dont know what to do. On the bright side i went through almost 2 quarts of brake fluid trying to get it figured out so now it has fresh fluid in it.
any ideas on what in the world could still be causing this?
and forgot to add my abs light was going on and off before I worked on the brakes and now its on and hasnt went off
edit: after reading up on things, i think it might be the master cylinder with air in it. seems like the most logical choice.

1_nice_03_gt · November 5th, 2011, 09:19 PM

did you bleed your master cylinder and your abs system?

FloridaStang · November 5th, 2011, 10:38 PM

no i didnt bleed either one, im going to bleed the master cylinder tomorrow but i cant find any info on bleeding the abs system. best thing i found was hit your brakes on a slick surface to kick the pump on lol. have no idea if they would even work

FloridaStang · November 6th, 2011, 02:45 PM

fixed it today, bleed the master cylinder and had it going in 10 mins. works great now, installed the cobra brakes again after i found out that was the problem and everything works. only thing is abs light is still on.

November 5th, 2011, 06:08 PM	#1
FloridaStang Regular 2003 Mustang GT Join Date: Mar 2011 Location: San Diego Posts: 193 iTrader: 0 reviews	Brake problems, pedal is spongy I bought a set of cobra calipers and put them on the other day and bleed them and the pedal was still mushy, in the process i sucked air through the master cylinder and had to bleed all 4 corners. I bled each wheel RR, LR, RF, LF. in that order and didnt see anymore air in the clear line. Couldnt figure it out and the mechanic at the shop i was at said he though the calipers where the problem so i swapped them out and put my old ones back on and still couldnt get it to work so now im still stuck with stock calipers and rotors and now they dont work either, i dont know what to do. On the bright side i went through almost 2 quarts of brake fluid trying to get it figured out so now it has fresh fluid in it. any ideas on what in the world could still be causing this? and forgot to add my abs light was going on and off before I worked on the brakes and now its on and hasnt went off edit: after reading up on things, i think it might be the master cylinder with air in it. seems like the most logical choice. __________________ Military Crew U.S. Navy/ATAA NAS north island Last edited by FloridaStang; November 5th, 2011 at 07:05 PM.

November 5th, 2011, 09:19 PM	#2
1_nice_03_gt Hardcore Enthusiast 2003 ford mustang gt 13.9 stock Join Date: Sep 2010 Location: bay area Posts: 1,473 iTrader: 1 reviews	did you bleed your master cylinder and your abs system? __________________ k&n cai, mangaflows exhaust, summit udp's, 24lb injectors, 78mm bbk plenun, tri-ax s/s, a/c delete,3.73's, aluminum drive shaft, upr upper/lower control arms, solid motor mounts, bbk heades, upr xpipe,bbk cc plates, camber bolts.bama tune

November 5th, 2011, 10:38 PM	#3
FloridaStang Regular 2003 Mustang GT Join Date: Mar 2011 Location: San Diego Posts: 193 iTrader: 0 reviews	no i didnt bleed either one, im going to bleed the master cylinder tomorrow but i cant find any info on bleeding the abs system. best thing i found was hit your brakes on a slick surface to kick the pump on lol. have no idea if they would even work __________________ Military Crew U.S. Navy/ATAA NAS north island

November 6th, 2011, 02:45 PM	#4
FloridaStang Regular 2003 Mustang GT Join Date: Mar 2011 Location: San Diego Posts: 193 iTrader: 0 reviews	fixed it today, bleed the master cylinder and had it going in 10 mins. works great now, installed the cobra brakes again after i found out that was the problem and everything works. only thing is abs light is still on. __________________ Military Crew U.S. Navy/ATAA NAS north island

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