Brakes not always responding
Thread Starter
Joined: 03-21-2017
Posts: 8
From: Austin, TX
Hey All,
Been a hot minute - **UPDATE** I reflushed everything, checked all the hoses, seals, valves, etc, made sure there's no air in the system, and nope! The brakes are still 50/50. Pretty sure it's ABS at this point. Would there be a blockage somewhere? Or should I just go about replacing it?
My next step is to call around and see if anyone would be willing to program an ABS module and then go ahead and replace it.
Unless y'all have any other ideas or feedback, think this may be my next step/only option.
Thoughts?
BTW, Happy New Year!
Been a hot minute - **UPDATE** I reflushed everything, checked all the hoses, seals, valves, etc, made sure there's no air in the system, and nope! The brakes are still 50/50. Pretty sure it's ABS at this point. Would there be a blockage somewhere? Or should I just go about replacing it?
My next step is to call around and see if anyone would be willing to program an ABS module and then go ahead and replace it.
Unless y'all have any other ideas or feedback, think this may be my next step/only option.
Thoughts?
BTW, Happy New Year!
Moderator
Joined: 01-23-2009
Posts: 26,532
From: Fredericksburg,VA
I don't know how the ABS could do anything of this sort, especially with no code. Do you know what ABS is? It activates opposing brakes to compensate for uneven wheel speeds; it does not deactivate anything
Did you replace the booster? Or, look for the source of the "hissing"? You tested and found that it was suspect.
A member found that the booster fitting on the manifold had cracked.
Or, adjusted the rear brakes, as suggested several times.
Did you replace the booster? Or, look for the source of the "hissing"? You tested and found that it was suspect.
A member found that the booster fitting on the manifold had cracked.
Or, adjusted the rear brakes, as suggested several times.
Thread Starter
Joined: 03-21-2017
Posts: 8
From: Austin, TX
Sorry for the delayed responses, The reason I keep thinking ABS is because the brakes are insanely soft and the pedal goes all the way to the ground unless I pump it.
_If it's the booster, if my knowledge is correct, the brakes would be very hard?
_Yea I bled the thing 3 times, and replaced the master cylinder. I worked w a mechanic buddy of mine and there's no air in the system. Kinda at a loss. Much as I don't want to go to a shop to save $$ I'm almost at that point.
_If it's the booster, if my knowledge is correct, the brakes would be very hard?
_Yea I bled the thing 3 times, and replaced the master cylinder. I worked w a mechanic buddy of mine and there's no air in the system. Kinda at a loss. Much as I don't want to go to a shop to save $$ I'm almost at that point.
Thread Starter
Joined: 03-21-2017
Posts: 8
From: Austin, TX
Oh yea, we did that when we replaced the master cylinder. All usual suspects were taken care of - tightening rear pads, replacing front pads, flushed the fluid 4x to make sure there's no air, and replaced the master cylinder. It's just weird that the pedal just drops sometimes and works regularly other times.
Senior Member
Joined: 03-29-2022
Posts: 1,241
From: Davison MI
I'd get in the dirt and lock the brakes up several times. Sometimes the ABS needs to be exercised to get the valves working good. That includes the dump valve which is known to cause these kinds of problems. Back in the early days we rebuilt them.
