Brake Pedal Binding
Recently I've been noticing my brake pedal binding up and then snapping forward while braking. This doesn't happen 100% of the time, and my brakes always work, bind or no bind.
Checkout the video below of the problem, the pedal will start to depress like normal and then suddenly snap forward a few more inches. I've done a quick search on the forum and couldn't find a problem quite like mine. https://www.youtube.com/watch?v=t7pM...ature=youtu.be Any suggestions? Thanks! |
:coffee:
I remember our resident electrical guru, RAD4Runner, had a very similar problem. Let's see if I can find that post. Ah, here it is: https://www.yotatech.com/forums/f116.../#post52397592 RAD4Runner and I suspected a bad brake booster was the problem but I do not know if the problem was ever resolved or what the actual cause was. Hopefully he will chime in. :safari: |
Originally Posted by old87yota
(Post 52405861)
... RAD4Runner, had a very similar problem.
Ah, here it is: https://www.yotatech.com/forums/f116.../#post52397592 O.P., Once you come to a stop, and try doing it several times does it go away? When the engine is off, does it EVER happen? Never in my case, which leads me to believe it is a problem with the vacuum booster. ALL, Consistently, before I crank, I would step on brake. Once truck starts, brake pedal does not go down like my other vehicles did. Do your guys' truck do same? Considering finding vacuum booster and master cylinder assembly for a later year 2nd gen. That's supposed to have dual-diaphragm booster and will plug-and-play in a first-gen 4Runner. Any thoughts? |
Originally Posted by RAD4Runner
(Post 52405880)
...
ALL, Consistently, before I crank, I would step on brake. Once truck starts, brake pedal does not go down like my other vehicles did. Do your guys' truck do same? ... The 86 only dropped about a quarter of an inch, maybe a half. (Note: 22ret w/ less than the usual 20inch vacuum) The 94 gives a much more noticeable drop. |
Originally Posted by RAD4Runner
(Post 52405880)
Considering finding vacuum booster and master cylinder assembly for a later year 2nd gen. That's supposed to have dual-diaphragm booster and will plug-and-play in a first-gen 4Runner. Any thoughts?
|
Will it do what it does in the video while the engine is stopped?
Inspected the one-way valve to the booster isn't sticking? |
Originally Posted by Co_94_PU
(Post 52405918)
Will it do what it does in the video while the engine is stopped?
Inspected the one-way valve to the booster isn't sticking? |
Originally Posted by xylicon
(Post 52405920)
With the engine stopped the pedal does not do what you see in the video, instead it firms up after a couple pumps and remains firm until I start the engine, after the engine is started the pedal will depress and it will act like it does in the video if I keep pumping it.
|
Originally Posted by RAD4Runner
(Post 52405934)
On mine, once I stop, If I keep pumping, the problem goes away. Verify yours please?
|
https://goo.gl/images/7ycDn7
https://goo.gl/images/IOjjWR These illustrate what I failed to describe properly about vents being blocked/leaking. (I hope..) |
All times are GMT -8. The time now is 05:14 PM. |
© 2024 MH Sub I, LLC dba Internet Brands