[mrnickleye]

The hoses won't be plugged, but the valve on the firewall may not be opening all the way. Pull the vacuum hose off the little solenoid and put it directly on the water control valve.

This will give you full valve opening.

make sure there is vacuum at that little vacuum hose. when I got my car it was not hooked up on the other end to the intake manifold, so the heater core was not getting water.