power brake ploblems
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 35
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From: Las Vegas Nevada
Year: 1990
Model: Cherokee
Engine: 4.0
power brake ploblems
not sure what to check. my dads 1987 jeep Cherokee has a brake pedal that is hard for the first 1/4inch of travel then all the brakes are there super soft pedal if your not used to it you will hit the steering wheel. any help
CF Veteran
Joined: May 2012
Posts: 3,242
Likes: 2
From: Colorado
Year: 1992 Cherokee Sport
Engine: Bone-Stock 242
Wha-huh? Grammar and punctuation is more important than most people think 
So... The pedal is initially really hard to press, an there is no braking. Then the pedal suddenly goes soft and the brakes rapidly apply, correct?
So... The pedal is initially really hard to press, an there is no braking. Then the pedal suddenly goes soft and the brakes rapidly apply, correct?
CF Veteran
Joined: Sep 2011
Posts: 4,172
Likes: 4
From: Riviera, Texas
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
A hard brake pedal is usually caused by a bad vacuum check valve. At least in my experiences with them going bad. Make sure that it isn't sticking. BTW if your not sure where it is. It's the one on the brake booster that has the hose connected to the manifold.
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