Help! Hard pedal, weak brakes!

[English Guy]

Today my 89's brakes went weird, had to really jam down the pedal to get brakes to bite:ugh. No problems the day before with stopping power decreasing/ fading. All pads, fluids and discs in very good order and no leaks or air locks:confused. Any advice would be very appriecated, many thanks .

 

[Hayabusa]

When my brakes were like you describes I changed the brake booster, then I had brakes again, it is a little tricky, helps to have friend with you.

 

[boomdriver]

Yep...

you might look at the vac line from the booster to the intake, but more than likely the booster has failed. :ugh

Not an impossible task to replace, just challenging in some ways. :eyerole Boosters sell for anywhere from $150 to$350...depends on where/who you buy from. FleaBay might be an acceptable alternative. Many sellers offer a warranty on their salvaged parts like this.

 

[Huskerman]

I had that problem on my 90 one time and I changed out the brake fluid....which I think was original and it was all better....just saying

 

[English Guy]

I had that problem on my 90 one time and I changed out the brake fluid....which I think was original and it was all better....just saying

Thanks for the advice guys I was hoping the booster was ok as when the pedal is pressed the fluid level in the 2 top up reservoirs rises slightly:confused indicating something is happening inside the booster.