Upgraded brake issue
08-24-2012, 02:45 PM
#1
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Upgraded brake issue
Up graded my booster to the double diaphragm one over year ago . Been getting different pedal heights when braking . Bought new master ,different proportioning valve spring installed ,booster test good ,brakes adjusted properly no air in system. Any one else ever have this issue ever
08-24-2012, 03:55 PM
#2
Junior Member
Man, Idk what to tell you...
Brake systems are pretty straight forward. It usually always leads back to air in the lines.
Maybe I'm not understanding. By "Different pedal heights" do you mean that you push it one time and it's one height, push it again right behind it and it's a different height? Randomly up and down.
Or do you mean that each time you push it it get's higher?
Brake systems are pretty straight forward. It usually always leads back to air in the lines.
Maybe I'm not understanding. By "Different pedal heights" do you mean that you push it one time and it's one height, push it again right behind it and it's a different height? Randomly up and down.
Or do you mean that each time you push it it get's higher?
08-24-2012, 04:06 PM
#3
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Man, Idk what to tell you...
Brake systems are pretty straight forward. It usually always leads back to air in the lines.
Maybe I'm not understanding. By "Different pedal heights" do you mean that you push it one time and it's one height, push it again right behind it and it's a different height? Randomly up and down.
Or do you mean that each time you push it it get's higher?
Brake systems are pretty straight forward. It usually always leads back to air in the lines.
Maybe I'm not understanding. By "Different pedal heights" do you mean that you push it one time and it's one height, push it again right behind it and it's a different height? Randomly up and down.
Or do you mean that each time you push it it get's higher?
08-24-2012, 04:12 PM
#4
Junior Member
I run my late model booster with a WJ master and stock prop valve.
I have no clue what would make an intermittent problem with a brake system.
Notice any lost fluid?
I have no clue what would make an intermittent problem with a brake system.
Notice any lost fluid?
08-24-2012, 04:26 PM
#6
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
changing the spring in pro valve did make a difference after booster upgrade difference deff worth the effort
08-24-2012, 04:26 PM
#7
Junior Member
I agree. It's quite strange.
I've never changed the spring. The booster upgrade itself made more than enough difference for me.
I've never changed the spring. The booster upgrade itself made more than enough difference for me.
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08-25-2012, 09:38 AM
#9
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Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
ok seem slow driving is affecting brakes rev motor seems pedal gets good and stiff any ideas?
08-25-2012, 09:46 AM
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Year: 1996
Model: Cherokee
Engine: 4.0
08-28-2012, 04:41 PM
#13
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Year: 1990
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So, 9 out of 10 times the pedal height is normal and 1 out of 10 times the pedal goes to the floor like a bad master cylinder? No hiss when this happens and it's more common at lower engine RPMs?
