Pickup 2WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1989)
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EGR Vacuum Modulator: Testing and Inspection
Fig. 193 Vacuum Modulator Test
Fig. 194 Vacuum Modulator Test
1.
Disconnect vacuum hoses from EGR vacuum modulator.
2.
Place finger over the two end ports, Fig. 193
3.
Blow air into the single port.
4.
Ensure air passes through the air filter side freely.
5.
Start the engine and maintain engine speed at 3000 RPM.
6.
Repeat test and ensure there is a strong resistance to air flow, Fig. 194