ddw350
Registered User
i fooled with it for awhile today and did as one member suggested by listening for a vaccumm leak under the dash where the booster enters through the fire wall.it wasnt till i pushed the pedal down with my hand and noticed a "swooshing" sound from the center[where the rod is surrounded by a yellowish foam,i took the grey boot off]of the booster.i covered this area with my hand and noticed air pushing[or pulling,i cant really tell] from this area.its like when i hit the brake pedal at idle,the booster just blows the air right out the back of it,causing my pedal to go way down...?? in case you didnt know,my brake pedal goes way down with no resistance at idle or low rpm,s.it then triggers the firm ride light.i put a new master cyl on when i noticed brake fluid dripping on my floormat,[it ran down the push rod from the leaky master cyl i guess.but at regular speeds the braking is fine] then the whole system was vaccumm bled to ensure no air in the system...