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Member
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Join Date: Aug 2019
Location: Kailua, HI
Posts: 69
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Member
Join Date: Aug 2019
Location: Kailua, HI
Posts: 69
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Ok I'm 90% sure I've got it figured out. I believe it's the master cylinder failing. I bled the brakes this morning and flushed out some nasty looking fluid, dark brown! The brakes are maybe a tiny bit better but still the pedal goes to floor especially when holding it at a light. Also the idle drops really low. This confused me for a bit because I know that the booster can affect the idle, but since that is new, and since these are power brakes I think it's just drawing down current and pulling on the idle. I did check the valve inline from the manifold to the booster and it's working properly. Also the hose is fine too.
Since I literally just did the brakes and booster a couple months ago I can only imagine it's the master cylinder failing. I remember reading that when you do the booster you should change the master, but since it seemed to be working fine I left it alone. Since there's no leaks appearing anywhere in the system including around the master cylinder I've deduced after reading around the internet that it's probably leaking internally. i.e. fluid is moving past inner seal and just moving back and forth inside the cylinder instead of out to the calipers.
Gonna pick one up as well as some new brake fluid and hopefully get the rig safe again.
I thought it was a water related thing, but maybe that just pushed it over the edge? I'm not sure, but hoping this is the trick...
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Current: 2011 Trail Edition T4R
Bilstein Leveling Kit: 6112's and 5160's
TRD 17" Gold Wheels 31" TA's
Sold:1994 T4R 22re 4x4 MT
Aluminum Weld 15's and 31x10.5 BFG ATs
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