odd brake noise
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Senior User
Joined: May 2005
Posts: 119
Likes: 0
From: orange county and LA
odd brake noise
when i press down the brake pedal somewhat hard, it sounds like theres air or someting being released.. sound odd? i think so. it brakes fine but, it's just sometimes.. the brake pedal goes really low and sometimes it doesnt. the lines have been bled.. but, i still get that sound and it sounds like it comes from inside the cabin :/
Laughing Gas
Joined: Jan 2005
Posts: 834
Likes: 0
From: South East Florida
depends on whether or not you are a do it yourself type of guy. if you are look in your haynes manual it should help you out
its basically 4 bolts behind the dash on the firewall and you have to bleed the brake system and remove that big black bowl on the drivers side firewall and replace it
haynes will help
brake booster good luck
its basically 4 bolts behind the dash on the firewall and you have to bleed the brake system and remove that big black bowl on the drivers side firewall and replace it
haynes will help
brake booster good luck
Elder User
Joined: Mar 2006
Posts: 588
Likes: 0
From: Bellville TX. Wof Houston
the booster is what makes power breaks...
it should get harder to press the break down....
sometimes "Like on my 88 Ranger" it can go for years like this...
If your NOT a do-it-your-self'er and it's nothing but a PITA then dont worrie about it...
your breaks wont go out. wait untill you have a real hard time perssing them down then get it fixed
it should get harder to press the break down....
sometimes "Like on my 88 Ranger" it can go for years like this...
If your NOT a do-it-your-self'er and it's nothing but a PITA then dont worrie about it...
your breaks wont go out. wait untill you have a real hard time perssing them down then get it fixed
Laughing Gas
Joined: Jan 2005
Posts: 834
Likes: 0
From: South East Florida
like bohiaa said. . . its not that your brakes are gonna go any time soon. although you need to check any soft pedal or sinking or fluctuating feeling
the hissing noise is a bad diaphragm inside the booster. annoying more than anything really
the hissing noise is a bad diaphragm inside the booster. annoying more than anything really
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
A leaky booster is essentially a vacuum leak. If it gets bad enough, it can cause engine problems like any vacuum leak can. Also, you're letting unfiltered air into the engine through the vacuum booster.
If it were my truck, I'd take care of it. It's not a difficult repair, but I would definitely advise getting a repair manual.
If it were my truck, I'd take care of it. It's not a difficult repair, but I would definitely advise getting a repair manual.
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Laughing Gas
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From: South East Florida
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Junior User
Joined: Dec 1999
Posts: 58
Likes: 0
From: Hubbard USA
It might not be the booster.
I had the same noise, changed the booster, still had the noise, vacuum hiss.
Then I found this button switch thing that the brake pedal activated. It has a black hose attached. When the brakes are off, the button is pushed in, no hiss.
When the pedal is push down, button out, hissing.
Any ideas what this thing is?
I had the same noise, changed the booster, still had the noise, vacuum hiss.
Then I found this button switch thing that the brake pedal activated. It has a black hose attached. When the brakes are off, the button is pushed in, no hiss.
When the pedal is push down, button out, hissing.
Any ideas what this thing is?
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
It's the cruise control disconnect. It's a safety feature so that if the cruise module doesn't disengage, the hose you see at the brake pedal opens the vacuum line to fresh air to keep the vacuum servo from pulling the throttle open since it doesn't have vacuum to do that anymore.
Junior User
Joined: Dec 1999
Posts: 58
Likes: 0
From: Hubbard USA
Thanks.
I'll just remove the hose and seal the vacuum connection, its got holes in it, cause my cruise control has been removed from the truck.
I'll just remove the hose and seal the vacuum connection, its got holes in it, cause my cruise control has been removed from the truck.
Last edited by farlight7; Sep 23, 2006 at 07:14 AM.