*Need Help* Brake Problem
Thread Starter
Racer
Joined: Aug 2005
Posts: 385
Likes: 0
From: Apopka Florida
*Need Help* Brake Problem
I have 96 LT4 w/J55's. I started my car up on monday to drive to work, and my brake pedal was hard. Little to no braking power, pedal stays hard when the car is started, and when off. I checked the brake booster vaccum line that goes into the front of the booster to the intake manifold and there is no leaks. The car idles fine, nothing out of the ordinary. I pulled the line off the intake manifold while the car was running, and there was still vaccum. Should there be suction from the into manifold to the booster, or from the booster to the mainfold? Right now air is being pulled from the booster into the manifold. I don't know much about boosters but that seems to be right to me.
I have heard there is a check valve near/around the brake master cylinder that can go bad. I went to my local dealer and the only thing he could find was a check valve between the cylinder and the booster. Is this the valve that could be causing my problems?
I have heard there is a check valve near/around the brake master cylinder that can go bad. I went to my local dealer and the only thing he could find was a check valve between the cylinder and the booster. Is this the valve that could be causing my problems?
Pro
Joined: Feb 2006
Posts: 688
Likes: 0
From: Concord NC
Been here before get ready to start paying out. Master cylinder and/or Brake booster. Replace both at the same time cuz its a major PITA.
Ill buy a new care before I do that again. Best of luck BTW your looking at atleast 200$$ of parts not including your own labor
Ill buy a new care before I do that again. Best of luck BTW your looking at atleast 200$$ of parts not including your own labor
Le Mans Master
Joined: Feb 1999
Posts: 9,913
Likes: 37
From: South Carolina
St. Jude Donor '03 & '05
generally there is a crack in the Booster. I had mine, it was near the exhaust header (it was a very difficult to see crack). With a Booster cracked you wont have any vacuum or idle problems, but if the master cylinder is bad, you wont break very well at all. With a cracked booster its a hard pedal but able to brake.
Racer
Joined: Oct 2002
Posts: 470
Likes: 1
From: Kingwood TX
I replaced both on my sons 91 L98. I"m almost 70 years old , over weight & still I crawled under there & replaced it While my 94 year old mother handed me the wrenches & pulled me out from under there by my feet.
Hard no,Get some cushions on the floor,get comfortable & get after it.
Hard no,Get some cushions on the floor,get comfortable & get after it.
