Weak Brake Booster
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Senior User
Joined: Apr 2009
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Weak Brake Booster
How can I tell if the brake booster needs replaced?
I am doing work on my truck - just short of a full resto and want to replace what makes sense, but not spend money just to do it either.
The breaks were a bit stiff when the truck was running, but the vacuum line did not seal well, engine did not run great, and there could have been air in the lines...
Any thoughts? The truck will have around 400 hp when done, so I want to make sure the brakes are good. I am replacing the master cyl and lines for sure.
Secondly - if I replace it, what's the best place to get one? I know autozone has a nice affordable brake booster and master cyl combo, rebuilt.
I am doing work on my truck - just short of a full resto and want to replace what makes sense, but not spend money just to do it either.
The breaks were a bit stiff when the truck was running, but the vacuum line did not seal well, engine did not run great, and there could have been air in the lines...
Any thoughts? The truck will have around 400 hp when done, so I want to make sure the brakes are good. I am replacing the master cyl and lines for sure.
Secondly - if I replace it, what's the best place to get one? I know autozone has a nice affordable brake booster and master cyl combo, rebuilt.
Elder User
Joined: Apr 2009
Posts: 735
Likes: 1
There is an in vehicle test
http://www.ehow.com/how-does_4829365...-boosters.html
Inspect the check valve and its grommet first.
http://www.ehow.com/how-does_4829365...-boosters.html
Inspect the check valve and its grommet first.
Senior User
Joined: Jun 2010
Posts: 286
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From: hesperia calif.
Dont use a rebuilt Master Cyl. buy a new one, rebuilt Master Cylinders dont last very long, normally they will last untill the Warranty is over 
LOL, i have had nothing but trouble with Rebuilt MC, Go to NAPA for your parts, they are very high Quallity and very reasonable, make sure all of your vacuum lines are sealing before trying to Diag. The Booster, Normally the Check valve that goes into the Vacuum Booster housing grommet goes bad.
LOL, i have had nothing but trouble with Rebuilt MC, Go to NAPA for your parts, they are very high Quallity and very reasonable, make sure all of your vacuum lines are sealing before trying to Diag. The Booster, Normally the Check valve that goes into the Vacuum Booster housing grommet goes bad.
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