No rear brakes... Lspv diagnosis (1 Viewer)

[Chase77]

My wife 93 4runner isn't getting fluid to the rear brakes. The fronts are bleeding properly but very little fluid is coming out of the LSPV port that feeds the soft line that goes down to the axle. Fluid is bleeding from the LSPV bleeder but with a lot of air coming out as well.

Is there anything else that could cause these symptoms other than a bad LSPV valve?

 

[WristPin]

could be a clogged bleeder take it out and clean it.

 

[Downey]

My first impression is "big rear end lift kit without readjusting proportioning valve linkage at axle housing", this will deminish fluid flow to rear brakes. But then you mentioned air bubbles, which is either poor bleeding of air OR defective Prop. Valve?????

 

[alabamatoy]

But then you mentioned air bubbles, which is either poor bleeding of air OR defective Prop. Valve?????

Or bad MC, damaged brake lines, loose fittings, low MC brake fluid level....

 

[cruiser88]

My wife 93 4runner isn't getting fluid to the rear brakes. The fronts are bleeding properly but very little fluid is coming out of the LSPV port that feeds the soft line that goes down to the axle. Fluid is bleeding from the LSPV bleeder but with a lot of air coming out as well.

Is there anything else that could cause these symptoms other than a bad LSPV valve?

Did you install any new brake components? Anything at all that would likely increase pressure on the master cylinder?

 

[raydouble]

Are you bleeding them in order?

RR, LR, RF, LF then LSPV
x 2 on possible clogged brake bleeders.

 

[Chase77]

I made a bracket to compensate for the lift. I ruled out a MC bc the fluid is getting to the LSPV but not making it past it and going into the rear cylinders.

How do I go about diagnosing this? Should I pull the LSPV and blow air through it?