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Old Feb 9, 2016, 08:51 AM
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89 toyota truck load sensing proportioning valve

Old Aug 8, 2017 | 08:30 AM
  #41  
88_4x4_SR5's Avatar
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Originally Posted by Ryan Ramsaran
would a none functioning valve lead to a hard pedal?

engine off - pump pedal till its gets hard and hold it - start engine - pedals goes down a bit - still hard to press whilst driving.

if you stand-up on it, it stops de van but.. its hard to press almost like its not getting any assist.

Did you ever figure out what your issue was? I am having the EXACT same issue with my truck.
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Old Aug 8, 2017 | 09:52 AM
  #42  
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turned out to be a combo of master and booster. i just swapped to a complete master and booster from a working van and problem was rectified
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Old Jan 25, 2020 | 12:41 PM
  #43  
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i need help i lifted the truck from the front and the rear proportional valve started leakin. the rubber boot is inflated what do i do.
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