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XB brake booster hissing! 

 

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 Post subject: XB brake booster hissing!
Posted: Fri Feb 17, 2012 12:09 am 
Getting Side Ways
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Location: Adelaide
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Hi guys, just putting the car in the shed before and I noticed that if I hold my foot down on the brake pedal hard, I can hear a hissing coming from the booster...the hell is that all about? I've never noticed it before - seems like its just started but if I push down with less force it doesn't do it... you know how with older falcons when you first press the brakes with power brakes they hiss for a second or so? Its like that but keeps going....other than that brakes seem normal, although I've not driven it since I noticed this noise....any ideas?

 

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351 4V XB Coupe running LPG

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 Post subject: Re: XB brake booster hissing!
Posted: Fri Feb 17, 2012 8:15 am 
Getting Side Ways
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Location: Adelaide
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update - just took it for a drive, brakes work 100% fine, with regular pressure to stop even aggressively - no problem. Its only if I push the pedal a bit harder once its stopped I can hear the hissing...thoughts?

 

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 Post subject: Re: XB brake booster hissing!
Posted: Fri Feb 17, 2012 10:15 am 
Getting Side Ways
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Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Does the engine pick up a few revs????
Sounds like the booster is on it's way out.

 

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 Post subject: Re: XB brake booster hissing!
Posted: Fri Feb 17, 2012 10:42 am 
Getting Side Ways
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Location: Adelaide
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nah, i was listening for that.. nothing. I mean, I hate to say it but yeh I think the booster is on its way out (even tho performance is completely unaffected) - to be quite honest it may have been going for quite a while, never really noticed it before...just happened to press the pedal a bit harder and can just hear it so I'm thinking pinhole in the diagphram ...

 

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