car doesen't want to stop!!

juiced_94gt · May 6, 2005

the other day i did my rear brakes and noticed that the driver rear was worn to the squealers, the sliders that the calipers bolt on to seem to be seized and i went ahead and put new pads, well that rim gets filthy black with brake dust and smells like brakes as soons as i drive it anywhere, today on the freeway the pedal goes all the way to the floor before it stops, i just bled the entire system with valvolyne dot 4 could it be the one corner causing all this? also only the inside pad gets worn, the outside pad is like new and the rotor is even rusty on the outside because it doesent make contact.

Chythar · May 6, 2005

The rear brakes have a minimal effect on the braking system. Apply your parking brake while in motion, and see how little it slows you down. It's the front brakes that do most of the work.

How does the pedal feel when you press it? Spongy (think of how a songe feels when you squish it)? Does the brake pedal slowly fall to the floor when applying constant pressure?

The driver's rear caliper can be fixed. The sliders are there to even out the braking force between the front & rear pads. If the sliders aren't moving freely, that's why your rear pad is jammed up against the rear rotor.

The sliders just pop off - the rubber piece covering the slider just pops off the caliper bracket. I cleaned out the channels the sliders go into, and lightly greased them up with bearing grease. They slide easily now with minimal effort. Don't add too much grease, or the sliders won't be able to move freely.

I had a similar problem with my 94 V6 (same brake system on the V6 and GT). I'm not sure exactly what it was, because I did several things at once. Since you've bled the brakes, either your rotors are too thin and need to be replaced, or your front rubber brake lines are worn out and need to be replaced. Thin pads and thin rotors means the caliper has to push farther to apply the brakes; and worn rubber lines will expand and absorb the brake pressure instead of sending it to the caliper.

I solved my brake problem by flushing the fluid, replacing the front brake lines with stainless steel hoses, and replacing all the pads and rotors with new ones. My pedal feel improved dramatically afterwards.

bimmertech · May 6, 2005

looks like you got a bad caliper on the one with all the brake dust. when you change the caliper always change the hose with it as the fluid in the bad caliper may get hot enough to collapse the hose.

1slow95 · May 6, 2005

For the rear, you will need to replace the bracket that the caliper bolts to. You can get one from the dealer. Make sure you order the pins too because they come seperate.

mo_dingo · May 7, 2005

Pushing the pedal to the floor would mean that there is a leak, or air in the system, or your booster is screwed.

But you are on the right track.
Scott

juiced_94gt · May 7, 2005

Chythar said:
The rear brakes have a minimal effect on the braking system. Apply your parking brake while in motion, and see how little it slows you down. It's the front brakes that do most of the work.

How does the pedal feel when you press it? Spongy (think of how a songe feels when you squish it)? Does the brake pedal slowly fall to the floor when applying constant pressure?

The driver's rear caliper can be fixed. The sliders are there to even out the braking force between the front & rear pads. If the sliders aren't moving freely, that's why your rear pad is jammed up against the rear rotor.

The sliders just pop off - the rubber piece covering the slider just pops off the caliper bracket. I cleaned out the channels the sliders go into, and lightly greased them up with bearing grease. They slide easily now with minimal effort. Don't add too much grease, or the sliders won't be able to move freely.

I had a similar problem with my 94 V6 (same brake system on the V6 and GT). I'm not sure exactly what it was, because I did several things at once. Since you've bled the brakes, either your rotors are too thin and need to be replaced, or your front rubber brake lines are worn out and need to be replaced. Thin pads and thin rotors means the caliper has to push farther to apply the brakes; and worn rubber lines will expand and absorb the brake pressure instead of sending it to the caliper.

I solved my brake problem by flushing the fluid, replacing the front brake lines with stainless steel hoses, and replacing all the pads and rotors with new ones. My pedal feel improved dramatically afterwards.

yes my pedal does go to the floor when i apply constant pressure, they are also spongy, and when i pump them they even sound "spongy" i have ss lines all the way around.

Chythar · May 9, 2005

juiced_94gt said:
yes my pedal does go to the floor when i apply constant pressure, they are also spongy, and when i pump them they even sound "spongy" i have ss lines all the way around.

That's never good. Sounds like you either have a leak in your brake system, you didn't bleed the brakes right or you let some air in the system. If you're bleeding your brakes on your own, I highly recommend you buy a set of Speed Bleeders (http://www.speedbleeder.com/). They make bleeding your brakes a one-person process.

How's the fluid level in your brake reservoir? In what order did you bleed your brakes? Right rear, left rear, etc?

juiced_94gt · May 10, 2005

i actually bled my brakes starting at the front, and no particular order, what is the correct order? i hope its just air, and i should get some speedbleeders i think my g/f's right leg is getting thicker than the left one fluid in the resevoir is at the max line.

Chythar · May 10, 2005

juiced_94gt said:
i actually bled my brakes starting at the front, and no particular order, what is the correct order? i hope its just air, and i should get some speedbleeders i think my g/f's right leg is getting thicker than the left one fluid in the resevoir is at the max line.

You bled them in the wrong order, so it's possible you have air in the system. You also might not have removed all the old fluid. You always bleed the wheel that's farthest from the brake resevoir first. So, the right order is right rear, left rear, right front, left front. Bleed it until you see clear fluid, then close it off. Be sure to close it off while fluid is coming out, to make sure no air is being sucked back in the system. The Speed Bleeders make this really simple, 'cause their design won't let any air in the system at all.

You should also double-check you're not losing fluid somewhere. Does the fluid resevoir keep dropping, or is it staying level?

rude_life · May 10, 2005

Chythar said:
The rear brakes have a minimal effect on the braking system. Apply your parking brake while in motion, and see how little it slows you down. It's the front brakes that do most of the work.

The rear braking combined with the braking of the front brakes have a significant impact on your overall braking ability.

car doesen't want to stop!!

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