My son's 89 Bronco with 5.0 is not getting warm enough. Have recently replaced Coolant Temp Sensor, Thermostat, and Water Pump. The fan clutch seems to have proper resistance. The heat has never really blown hot only warm. This is also causing a stalling issue when first driving. Have to let warm up several minutes before no stall. Temp gauge barely moves (I know they're not trusty) and coolant is not hot to touch with cap off, even after driving for a while. Hoses coming from heater core through firewall are both warm and warmer than radiator hose. Any suggestions?