Warm Engine RPM Too Low

CHECK:

1. Idle Adjusting Screw
2. Electronic Air Control Valve
3. Air Conditioning Signal
4. Alternator FR Signal
5. Automatic Transmission Shift Position Signal
6. Power Steering Oil Pressure Switch Signal
7. Vacuum Hoses And Connections
8. Electronic Control (ECU) Unit

NOTE: The system that could be the source of the symptom are listed and should be checked in order, starting with #1.