
Originally Posted by
WickedGoat
to check the master cylinder do this... with the car turned off pump the brake pedal up until it is stiff... keep your foot on the brake pedal and start the car up... if it sinks to the floor, chances are the master cylinder is probably done. The only other thing that you can do is bleed the ABS system with the brake system and see if that improves the brake pedal.
If I remember correctly, there should be a bleeder valve in the cooling system that you can open up and that will flush any air out. Double check the coolant elbows and the lower intake manifold gasket to make sure that they aren't leaking on you.