2-Port PVS
With cold engine and bottom port on PVS connected to vacuum source the top port should have no vacuum reading. With coolant temperature above the PVS range, see PVS COLOR CODES CHART , top port should have same vacuum as bottom port. If PVS fails to operate as described, replace valve.
PVS COLOR CODES CHART
| PVS Color | Temp. |
|---|---|
| Green | Above 68°F |
| Pink or Natural | Above 90°F |
| Black | Above 100°F |
| Plain 2-Tone or Blue | Above 133°F |
| Yellow or Gray | Above 155°F |