System Performance Test

SERVICE STALL TEST

Fig. 1 Service Stall Test Specifications:

Record the manifold gauge pressures and outlet temperature with the following preset vehicle conditions:
1. Install thermometer in right center outlet.
2. Open doors and windows to stabilize interior temperature with outside ambient air temperature.
3. Press ``RECIRC'' button.
4. Set temperature lever to full cold.
5. Select 3rd blower speed.
6. Press ``A/C'' button.
7. With engine warm, run at 2000 RPM.
8. Continue running until system pressures and outlet temperature stabilize (three to five minutes).
9. Record pressure and temperature.
10. Compare readings to normal system performance chart, Fig. 1.

45 MPH TEST

Fig. 2 45 MPH Test Specifications:

Recored manifold gauge pressures and outlet temperature with the vehicle conditions listed under ``Service Stall Test,'' except for the following conditions:
1. ``RECIRC'' "OFF" (outside air).
2. Vehicle running at 45 MPH with engine fully warm.
3. Compare readings to normal system performance chart, Fig. 2.