Brake issue and I’m in Canada 😝

Joined
Aug 13, 2009
Messages
166
Location
Pensylvania
I hear a puff of air when I hit the brakes and I’m thinking it’s coming from this baflle looking thing and the peddle is stiff as hell! Im like 700 miles from home in Ontario Canada lmao 🤣. Any. Ideas gentlemen?

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Joined
Aug 13, 2009
Messages
166
Location
Pensylvania
Has nothing to do with your master cylinder unless you have a slow leak going inside the booster causing the failure, one side of your booster is vacuum and the other is atmospheric pressure this is why you get that soft pedal brake assist.
Yup, no soft pedal assist!
 
Joined
Feb 26, 2007
Messages
1,488
Location
Lancaster, PA
Under the hood.
On the booster. The large round thing mounted to the firewall. You will see the master cylinder that has the fluid in it. You also have some vacuum hoses going to the booster. They need to be connected. Follow them and see if they have cracks or are disconnected from the other end. It's probably just 1 hose but I don't look at 80 engine bays often.
 

jonheld

 
Joined
Dec 8, 2006
Messages
8,202
Location
New Jersey
There is also a check valve on the booster. This has a grommet that can get brittle and leak. The booster needs to be air tight.
If the main vacuum line on the booster is in good shape and the check valve and grommet are in good shape, then the diaphragm inside the booster has failed and the booster needs to be replaced.
What year is your truck?
 
Joined
Aug 13, 2009
Messages
166
Location
Pensylvania
97 FZJ80 Brake boosters are still available from Toyota (44610-60792) but they are $600.
Yup, it’s a 97. I remember hearing the booster was more $$ than the master cylinder. I’ll take a look when I get back to the truck tomorrow. Thanks
 

jonheld

 
Joined
Dec 8, 2006
Messages
8,202
Location
New Jersey
Keep in mind that a used booster will have a limited life span. The diaphragm will dry out over time. Short term replacement.
I'm not suggesting that you spring for the OEM replacement, but just beware.
Being able to stop is way more important than being able to go.
The OEM master is about $200. I had to replace mine 2 years ago.
 
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