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The mkiv Supra Owners Club

stiff brake pedal


hoff

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My brakes (pads and disks) will need changing soon as they are getting a little spongy. However, occasionally the peddle feels very stiff when braking, at all speeds. What could be causing it? Would it be the lines are on their way out too, coroding from the inside and causing a slight air block or something?

 

Thanks:)

Adam

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Sounds like you are losing servo assistance occasionally. Common cause is someone fitting a totally unsuitable, but brightly coloured vac hose to the servo, that collapses under vacuum when warm.

 

You have such a way with words Chris

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It's very dangerous, the correct hose should have a steel wire spiral inside the braids to hold vacuum, it's because the hose is quite large in diameter, so the vac is pulling on a large surface area. NEVER change servo hoses unless you KNOW the replacement is totally compatible with the application.

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  • 3 years later...

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