I got new front pads had the rotors turned checked the rears and blead them all right rear left rear right front left front and blead the master. And she still wont lock up the Brakes. I tested the brake booster and it checked out ok . I have 15 to 16 inchs of vacume at idle. Anyone know what the problem could be she used to stop grate now the pedal is hard but spongy at the same time .

 

maybe a rubber brake line is weak?

 

 

I bench bleed the MC on the car there is no air in the system I dont have proper vac with this big cam at idle in drive I only have 12 inchs.

 

It takes a while for new pads to bed in. Particularily with new rotors. Usually 100 to 150 miles of regular driving. Until the pads and rotors are bedded you will not have full stopping power and may not be able to lock the brakes. Pedal may also feel a bit "soft" until bedding is finished.

Some pads, such as the Bendix Titanium line, have a special coating to decrease the bedding time.

BTW, it would help if you mentioned what you installed for pads. Some are good ( Such as Bendix Titanium, Stillen ) and some are crappola.

We did a survey on pads last year. Some good info there. Do a search for " What brake pads"