Need brake help....

Car is a 94 firebird. I have snap-on scanners....no codes
The brake pedal dropped while driving, it still has brakes but the pedal drops almost to the floor and the ABS seems to cut on sometimes( I hear it running , and it vibrates your foot)

Well I can't seem to figure it out.....Should I try to bleed them? no problems before this, it seems to me there should be a test to acctuate the ABS but I don't think the snap on scanner can do it.


Any help would be great......I have someone that wants to buy this car, and I need to fix it asap

The ABS system is separate from the PCM, and you're not going to get codes through the PCM for it. You need a special ABS scanner for that. Check that the master cylinder needs to be overhauled/replaced? Maybe the seals are leaking internally? Booster is bad?

If the pedal is going to the floor and you have adequate fluid and no leaks, I would suspect the master cylinder is bad.

If the pedal is going to the floor and you have adequate fluid and no leaks, I would suspect the master cylinder is bad.

Looks like the rear rubber line was colapsed internally.....replaced it and bled the brakes everything worked fine.


The pedal was going about half way, It still has brakes but you could just feel it wasen't right