demon Posted April 2, 2004 Share Posted April 2, 2004 My SR20 powered Z using a 75 7" brake booster and an '81 master cylinder has a strange condition occuring. When there is no vaccum to the booster (car is off) the pedal is fairly stiff and the brakes work correctly. When I start the car and there is good vaccum (~-20mm/hg) the pedal goes straight to the floor and does nothing. Any ideas? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
datsunlover Posted April 2, 2004 Share Posted April 2, 2004 I'll have to check mine (75 280z) but I think there's a one way valve of some sort in the vac. line from the intake to the booster.. maybe it got reversed or something? Or maybe I'm thinking of something else and I'm just talking out my butt... Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted April 2, 2004 Share Posted April 2, 2004 He's right. The check valve is in backwards. Quote Link to comment Share on other sites More sharing options...
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