Q&A

 Master

When you were putting in the brake pads its always best to crack open the bleeder at the caliper you are putting the pads in and push the piston back into the caliper that way the dirty fluid behind the piston gets pushed out the bleed screw and not pushed back into the brake master cylinder which would then possibly cause master cylinder failure. On the dual pot piston front calipers the bleed screw is at the top of the caliper not sure about single pot type. Rear calipers bleed screw is at top as well for sure. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online
Sounds like a bad master cylinder but make sure you are bleeding all the air out of the brakes!