Pulsair Valve: Testing and Inspection

Fig. 27 Removing second air hose from air cleaner:

Fig. 28 Bypassing thermal switch with jumper wire:

PULSE AIR CONTROL (SECONDARY AIR CONTROL) SYSTEM
1. Inspect hoses and pipe for cracks, kinks, damage, or loose connections.
2. Check that three-way solenoid valve wiring is properly connected.
3. With engine cold, disconnect second air hose from air cleaner, Fig. 27.
4. Start engine and allow to idle. Check that air is drawn into hose.
5. Allow engine to reach normal operating temperature.
6. With engine warmed up check the following:
a. Air should not be drawn into hose at idle.
b. Momentarily increase engine speed to over 3000 RPM, then release throttle quickly. Air should be drawn into hose during deceleration.
7. Disconnect thermal switch electrical connector and connect terminals on wiring harness side with lead (jumper) wire, Fig. 28. Check that air is drawn into hose while engine is idling.
8. Reconnect air hose to air cleaner and thermal switch electrical connector.

Fig. 29 Checking three-way solenoid valve when de-energized:

Fig. 30 Checking three-way solenoid valve when energized:

THREE-WAY SOLENOID VALVE (TWSV)
1. Disconnect vacuum hoses from TWSV (blue).
2. Blow air into nozzle 1, Fig. 29. Air should exit at filter 3 and not at nozzle
3. Disconnect TWSV electrical connector and apply 12V to terminals, Fig. 30. Blow air into nozzle 1, air should exit from nozzle 2.
4. Reconnect vacuum hoses and electrical connector.

Fig. 31 Testing second air valve:

SECOND AIR VALVE
1. Remove second air valve with air pipe.
2. Apply vacuum to diaphragm of second air valve and blow air into air hose, Fig. 31. Air should exit air pipe. Blow air into air pipe. Air should not exit air hose.
3. Install second air valve with air pipe.