Braking issues..help

[slowma70]

Well my brother purchased a supra and i been helping him with his car upgrading suspension, maintenance items and so on. When it came to the brakes it felt very spongy and I completely flushed and bled all the lines and still felt bad. So i replaced the master cylinder and installed goodridge SS brake lines which seemed to help, but it still does not brake properly.

Yesterday i decided to lift the vehicle on jacks and remove the wheels, while inspecting the front brakes again i saw that the driver side rotor would not spin freely as the passenger side so i removed the caliper and pressed the brakes to see if it was seized but it moved freely in and out.

88 Supra with ABS
Car has a rebuilt MC, new Goodridge ss brake lines, new pads and completely fresh brake fluid.

What would cause one side to lock up and the other side to be free?

Thanks..

 

[Backlash2032]

Just to be clear, what order are you bleeding the brakes from?

 

[slowma70]

Last time i bled it was from furthest from the master cylinder RR,LR,FR,FL.. I gonna bleed it again today or tomorrow starting furthest from the abs actuator.

You think that could be the prob? Also should the bleeding process be done with car on or off?

 

[hvyman]

Shouldn't matter. I've dobe it both ways. Never had a issue.

Sounds like a bad caliper or the slides are dry and needs to be greased.

 

[jdmfreak]

Shouldn't matter. I've dobe it both ways. Never had a issue.

Sounds like a bad caliper or the slides are dry and needs to be greased.

This^^^^

 

[slowma70]

Sounds like a bad caliper or the slides are dry and needs to be greased.

All the pins and slides are cleaned and greased with silicone paste, they move like butter... Im gonna bleed it again today to see if it helps

 

[slowma70]

been lazy with the car but today i ordered a rebuilt caliper since the piston wont release after cracking the bleeder. will update once installed

 

[IndigoMKII]

Does the wheel free spin without the caliper on?

Also, if that spongy feeling is still there, you might want to replace your vacuum booster.

 

[slowma70]

yes it does spin freely with the caliper off. hopefully this will work if not might have to replace the booster which is something im trying to avoid

 

[mk3supralove]

If you're still having problems with the pedal feel try getting a master cylinder brace that'll prevent the brake booster from flexing the firewall.

 

[Backlash2032]

If you're still having problems with the pedal feel try getting a master cylinder brace that'll prevent the brake booster from flexing the firewall.

That isn't his problem. Fwiw I have upgraded pads, rotors, and stainless flex lines and I have a firm pedal.

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