A/C System Performance
WARNING: This page is about a different car, the 1998 Pontiac Bonneville and 1998 Oldsmobile Eighty-Eight. However, it is still accessible from the selected car via links, so may be relevant.
- Park vehicle out of direct sunlight. Ambient temperature must be at least 43°F (6°C). Install manifold gauge set. Start engine. Turn A/C on. Place A/C control to maximum cooling, selector lever on full cold and blower switch on HIGH. Close vehicle doors and windows.
- Insert thermometer in center air outlet. Run engine at idle for 5 minutes. Measure temperature and system pressures. Temperatures and pressures should be within correct range. See A/C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS and A/C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS .
A/C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS
| Ambient Temp. °F (°C) |
Outlet Vent Temp. °F (°C) |
| 60-70 (16-21) |
42-50 (6-10) |
| 80 (27) |
47-57 (8-14) |
| 90 (32) |
53-63 (12-17) |
| 100 (38) |
55-65 (13-18) |
| 110 (43) |
60-70 (16-21) |
A/C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS
| Ambient Temp. °F (°C) |
High Side psi (kg/cm2
) |
Low Side psi (kg/cm2
) |
| 60-70 (16-21) |
155-200 (10.9-14.1) |
25-33 (1.8-2.3) |
| 80 (27) |
185-245 (13.0-17.2) |
29-37 (2.0-2.6) |
| 90 (32) |
190-280 (13.4-19.7) |
37-45 (2.0-3.2) |
| 100 (38) |
210-310 (14.8-21.8) |
39-49 (2.7-3.4) |
| 110 (43) |
230-350 (16.2-24.6) |
42-55 (2.4-3.9) |