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brake pedal stiff

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Old Jun 15, 2015 | 09:19 PM
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brake pedal stiff

i did search.

i changed the hose from brake booster to the intake today to make sure that wasnt an issue, it hasnt changed anything, so im guessing it is the brake booster.

i have no pedal throw whatsoever (compared to my daily driver)

i am running gsc s3 cams and vacuum sits at -10 to -8

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Old Jun 16, 2015 | 08:09 AM
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brake booster possible?
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Old Jun 16, 2015 | 10:19 AM
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Maybe check valve.
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Old Jun 16, 2015 | 11:45 AM
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Originally Posted by barneyb
Maybe check valve.

just replaced it with a new one yesterday.
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Old Jun 16, 2015 | 12:58 PM
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pull the vac line off the booster, start the car, if you feel good vacuum in the hose, then it's likely the booster.

To test the booster, you can use a vacuum pump to see if it holds vacuum. Or if it feels the same with and without vacuum applied, the diaphragm is bad..
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Old Jun 16, 2015 | 02:14 PM
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A good booster will give two assisted brake applications and somewhat on a third application before the pedal gets stiff.
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Old Jun 16, 2015 | 07:07 PM
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Originally Posted by letsgetthisdone
pull the vac line off the booster, start the car, if you feel good vacuum in the hose, then it's likely the booster.

To test the booster, you can use a vacuum pump to see if it holds vacuum. Or if it feels the same with and without vacuum applied, the diaphragm is bad..
thanks will try this! what kind of vacuum pump?
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Old Jun 17, 2015 | 11:04 AM
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Any hand vacuum pump form a parts store, just need to be bale to adapt to the hose size that the booster uses..
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