Brake pedal sinks to floor help!

HondaCRX881

New Member
5+ Year Member
10+ Year Member
ok scope this out, on my 91 crx si, i replaced all calipers, bled the brakes according to service manual, pedal sunk to the floor. it was fine before i replaced anything. but then again the caliper pistons were seized from sitting for too long and im pretty sure there was moisture in the lines. anywho, bought a new master cylinder hooked it all up, bled the brakes goes to the floor. pressure builds when the car is off but as soon as i turn it on the pedal sinks to the floor. the check valve is good and the only thing i can think of is the brake booster but not sure what other people think or know. any help?
 

DC2 EG

New Member
before putting the master cylinder on did you bench bleed it first?
 


HondaCRX881

New Member
5+ Year Member
10+ Year Member
yes, prolly not completely but ive put MC's on before without benchbleeding and bled the system and still been ok
 

bow2000SI

New Member
brake booster, and make sure all lines and connections are solid
 


HondaCRX881

New Member
5+ Year Member
10+ Year Member
thats what im hoping will fix the issue, i already got one on order so hopefully it arrives soon
 


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