A/C System Performance
WARNING: This page is about a different car, the 2001 Pontiac Bonneville and 2000 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
- Park vehicle out of direct sunlight. Install manifold gauge set. Start engine. Turn A/C on. Place A/C controls 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. Outlet air temperature should be about 20°F (7°C) less than ambient air temperature. Temperatures and pressures should be within correct range. See A/C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS
table.
A/C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS
| Ambient Temp. - °F (°C) |
High Side -psi (kg/cm2
) |
Low Side -psi (kg/cm2
) |
| 60 (16) |
130-160 (9.1-11.2) |
28-34 (2.0-2.4) |
| 70 (21) |
160-190 (11.2-13.4) |
32-38 (2.2-2.7) |
| 70 (21) |
175-205 (12.3-14.4) |
34-40 (2.4-2.8) |
| 80 (27 |
155-185 (10.9-13.0) |
33-39 (2.3-2.7) |
| 80 (27) |
180-210 (12.7-14.8) |
37-43 (2.6-3.0) |
| 90 (32) |
180-210 (12.7-14.8) |
38-44 (2.7-3.1) |
| 90 (32) |
180-210 (12.7-14.8) |
41-47 (2.9-3.3) |
| 100 (38) |
205-245 (14.4-17.2) |
46-56 (3.2-3.9) |
| 100 (38) |
210-250 (12.7-17.6) |
46-56 (3.2-3.9) |
| 110 (43) |
240-280 (16.9-19.7) |
48-58 (3.4-4.1) |
| 110 (43) |
240-280 (16.9-19.7) |
51-61 (3.6-4.3) |
| 120 (49) |
275-315 (19.3-22.1) |
58-68 (4.1-4.8) |