single to dual master cylinder conversion problem
I have a 62 impala with original power brakes that was converted from a single master cylinder system to a dual cylinder system. I installed a new power brake booster at the time of the conversion. I bench bleed the master cylinder before installing it and immediately upon installation hooked it up to the proportioning valve/ brake line system. I bleed the brakes several times at each wheel. The problem I am having is that after starting the car , the brake pedal goes all the way to the floor and has to be pumped several times before it gets resistance. The brakes stop the car o.k. but I am very uncomfortable with the initial week pedal. Any input would be helpful.