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The last couple of times I've driven the car,I've noticed that the brakes seem to be loosing boost. By that I mean when applying the brakes it feels as though there is no power assist. I know this requires vacuum for the power assist, but were would be a good place to begin? Do not want any problems when heading to BG next week.
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d
Start with a couple of checks, make sure the vacuum hoses are in decent shape and sealing to the port on the intake and booster, 2nd, there is a check valve between the booster and intake port, test it to be sure it isn't leaking back.

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S
Power brake bosters can,over time,fail like any other component. If the diaphram has failed you may be able to hear a hissing sound at the boster at idle.
Steve
Steve

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Send PMHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
I agree... if you dont hear any hissing sound its probably not the booster..
id check for a vaccum leak..
id check for a vaccum leak..
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Finally got a chance to check the power brake booster and sure enough it's hissing like a snake. Went online to check my usual parts sources and got somewhat surprised. The fisrt 2 I checked $160.00 + shipping. Then I went to Autozone $85.00 + $4.75 shipping. So I thought for a microsecond and put in the order.
While I was there ended up ordering new rotors/calipers for my full size van as well. Those things just eat brakes. Need to change them about every 12-15 months.
While I was there ended up ordering new rotors/calipers for my full size van as well. Those things just eat brakes. Need to change them about every 12-15 months.
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in Forum: C3 Engines, Driveline and Handling
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