92 Brake Problems continued...
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
92 Brake Problems continued...
I replaced the master with a rebuilt unit from Cardon. The price was right.
Bled all four wheels.
The pedal problem still exists. The calipers are all dry - so I don't think they are leaking.
The only cheap thing left is to bleed the ABS unit behind the driver's seat. Beyond that - the last part to replace is the ABS unit itself. That's an $1100 rebuilt part. It doesn't appear to be leaking anywhere..
I hate throwing parts at problems...
Any suggestions?
Bled all four wheels.
The pedal problem still exists. The calipers are all dry - so I don't think they are leaking.
The only cheap thing left is to bleed the ABS unit behind the driver's seat. Beyond that - the last part to replace is the ABS unit itself. That's an $1100 rebuilt part. It doesn't appear to be leaking anywhere..
I hate throwing parts at problems...
Any suggestions?
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
lemme get this straight, you bled the brakes, yet there was no fluid getting to the calipers from the master?
did you check the valve array in the ABS bin (behind the drivers seat) for any sign of leakage?
What is the pedal like? hard or soft (engine running)?
Did you bench bleed the new master? If not, it will be nothing short of a bitch to bleed.
did you check the valve array in the ABS bin (behind the drivers seat) for any sign of leakage?
What is the pedal like? hard or soft (engine running)?
Did you bench bleed the new master? If not, it will be nothing short of a bitch to bleed.
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
Originally Posted by ceberus
What type of pedal problem? I had a hard brake pedal and it turned out to be my brake booster.
Recently, the brakes have started to behave strangly. The pedal is suddenly very soft. The travel is longer as well. The pedal won't pump up. The brakes still work but worse than before (which was not so hot to start with)
In the last year I've replaced:
Master cylinder (with one from EBAY...questionable)
vacuum booster (with the metal one from that hotrod website)
brake fluid
pads (Hawk HPS)
rotors (slotted)
I've bled the system twice. There is no fluid leaks that I have found.
The change in pedal feel was very sudden - like something snapped. Any idea where to look first?
Last edited by mitchcole; Jun 30, 2006 at 11:23 AM.
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
Originally Posted by bogus
lemme get this straight, you bled the brakes, yet there was no fluid getting to the calipers from the master?
did you check the valve array in the ABS bin (behind the drivers seat) for any sign of leakage?
What is the pedal like? hard or soft (engine running)?
Did you bench bleed the new master? If not, it will be nothing short of a bitch to bleed.
did you check the valve array in the ABS bin (behind the drivers seat) for any sign of leakage?
What is the pedal like? hard or soft (engine running)?
Did you bench bleed the new master? If not, it will be nothing short of a bitch to bleed.
The pedal has very recently changed to a huge amount of travel, and very little resistance. The pedal doesn't push up against my feet. This all started after I slammed on my brakes the other day. I pressed hard against the pedal - ever since then it feels like something popped...
So, I bled the brakes again - no change.
So, I figured it wat the master cylinder - bought a replacement, did the bench bleed, installed it and bled the whole system again. - no change.
I've gone through the big container of valvolene synthetic DOT4 brake fluid (the quart size bottle) through the system. I didn't notice any problems with the rubber brake lines.. no bulging, leaks, etc.
What I meant about the dry calipers: Calipers fail by sticking or by leaking. Sticking would give a hard pedal (which I don't have) and leaking would be a mess - which it isn't.
The pedal travel is just weird. It goes almost all the way to the floor with very little effort.
I opened the hatch to the ABS module behind the driver's seat - and it appears dry. I'm not actually losing ang brake fluid from the master - the pedal feel is just way different and the car doesn't stop very well.
Has anyone ever had an ABS module fail?
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
the ABS module can fail, but it would not effect the pedal in this manner.
I am thinking you got a bad replacement master... Goto NAPA.
Have you physically inspected the brake pedal mechanism? It could be a mechanical failure... the pedal bracket is failing... who knows...
I am thinking you got a bad replacement master... Goto NAPA.
Have you physically inspected the brake pedal mechanism? It could be a mechanical failure... the pedal bracket is failing... who knows...
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
Having some experience in this area, I'm thinking you got a bad m/c.
It happened to me, purchased a NEW one and Viola, I have brakes.
When you open up the bleeders and hit the brake pedal, you should get wet. If the calipers are dry, you have a master cylinder problem.
It happened to me, purchased a NEW one and Viola, I have brakes.
When you open up the bleeders and hit the brake pedal, you should get wet. If the calipers are dry, you have a master cylinder problem.
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
Originally Posted by elefkow
Having some experience in this area, I'm thinking you got a bad m/c.
It happened to me, purchased a NEW one and Viola, I have brakes.
When you open up the bleeders and hit the brake pedal, you should get wet. If the calipers are dry, you have a master cylinder problem.
It happened to me, purchased a NEW one and Viola, I have brakes.
When you open up the bleeders and hit the brake pedal, you should get wet. If the calipers are dry, you have a master cylinder problem.
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Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
So, I bled the bleeder on the ABS module. I held the flex brake lines while the pedal was depressed.. Nothing noteworthy.
Pedal travel continues to be about 3" as measured from the steering wheel.
Any other thoughts?
Pedal travel continues to be about 3" as measured from the steering wheel.
Any other thoughts?