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Scoobie Doo said:
the Brake Servo uses exhaust manifold pressure to assist the brake pedal, if you try the brakes with the engine off the servo will lose its assistance hence you have to apply more pressure to get the same affect... they rarely go wrong unless there is a leak...
Forgive me if I'm wrong but doesn't the servo use the vacuum from the inlet manifold !!!!

Edited by: Deej
 
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