stupid brakes!!!!!!!!

[Slpr s13]

ok here it is, so when i start my car brakes feel kool, after i drive for about 10 mins, it start. my brake pedal get super hard. as im driving my car shakes side to side like if i was in an earthquake lol. and when i hit the brakes it shakes even more.. car avouisly feels like the brakes are being applied. there grabbing. how can i tel, lets say wen i put my car in nuetral and im on a downhill it dont go nowere. and wen i get on it feels likes im getting held back.
.... ok i noticed that wen i drove it for a while and stopped i saw smoke coming for the left front caliper. so took off my wheel saw that the pistion was leaking. so i went ahead and replaced it. brake flush, and bleeded all the calipers and had the same problem. i replaced it with a used but good shape one.
..ok i know that wen you have a pulsing pedal and also shaking involed it means you have warped rotors. i did see some heat marks on the rotors but did not see anything dramatic. pads look good . idk maybe contaminated fluid but not because did a flush. i just bought the car and lookes like the master cylinder looks new. the master cylinder cap has the little rubber thing is all ripped up.
.. idk maybe both front caliper were siezed and i need to replace the passenger side.
.. o yeah and wats weird is that sumtimes wen i drive it for a while like more than 30miles. beacuse i do daily drive it 40miles one way, after like 30miles it goes away the pedal goes soft again and no shaking wen driving but still alil shaking wen brakes are applied.
.. any help will be appreciated sorry for the big long story just wanted to say wats exactly goen on thnkx again

[sil80 monster]

maybe one of the calipers is staying locked up, is the right brake fluid in there? the shaking part sounds like warped rotors.

[Ben G]

Do you have abs?

[Slpr s13]

no abs ita a 90 coupe with red top.

[Ben G]

..ok i know that wen you have a pulsing pedal and also shaking involed it means you have warped rotors. i did see some heat marks on the rotors but did not see anything dramatic.

Heat scoring = fucked rotor change that shit

[john891]

Wow.....S...................((7

[Chrischeezer]

sounds like you have more then one problem here..
check your brake booster.

[Slpr s13]

kool ima changed them rotors asap with pads. and ill take a look at that booster too tnkx for the help guys. any other opinions?

[Hashiriya415]

check that you have clearance, the rod that comes from the MC to the pedal, seems it's not properly adjusted, from the sound of it, when it's cold its ok, when you start driving, heat builds up it starts expanding the fluid and your brakes apply, and the vibration could be the rotors warped

[Slpr s13]

nice tip will defenetly try it

[zylvia213]

check that you have clearance, the rod that comes from the MC to the pedal, seems it's not properly adjusted, from the sound of it, when it's cold its ok, when you start driving, heat builds up it starts expanding the fluid and your brakes apply, and the vibration could be the rotors warped

:stupid:... Also check that one way valve and the hose that connects to your booster. Make sure everything is cool there. Should have replaced both caliper and rotors or got them turned.... thay way you would have been able to cross 2 possibities out of the trouble shooting. If they are getting stuck then its gotta be the caliper, them things get rusted and get stuck or maybe the person who had that car before tried rebuilding them before and didnt put the piston that goes inside the caliper on right. Good luck

[Slpr s13]

i guess im goen to change out the other caliper. and rotors with pads and check all that shit out tnkx for the help guys.