CAR SAT FOR A FEW WEEKS NOW THERE IS LITTLE BRAKE PEDAL AND IT SHUDDERS REALLY BAD. CHECKED THE FRONT PADS AND THEY ARE FINE. CAR WAS FINE BEFORE IT SAT. THE REAR BRAKES WERE GRABBING A BIT BUT SEEM FINE NOW. ANY SUGGESTIONS ON WHAT TO CHECK OR DO?

 

try having the front rotors resurfaced