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Old Jun 22nd, 2011, 20:54   #4
Clifford Pope
Not an expert but ...
 

Last Online: Yesterday 15:46
Join Date: Dec 2001
Location: Boncath
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While you have the hose disconnected it would be worth blowing down it into the servo to check that the non return valve is working. If it leaks it won't hold vacuum properly.
Finally when you start up, keep your foot on the brake pedal and it should rise as the vacuum builds up. That means the servo is working properly.
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