Prizm L4-108 1.8L DOHC VIN 8 MFI (1995)
Testing EVAP TVV - 54 Degrees C (129 Degrees F)
EVAPORATIVE EMISSION THERMAL VACUUM VALVE CHECK
PRELIMINARY STEP
Drain engine coolant.
REMOVE OR DISCONNECT
1. Negative (-) battery cable.
2. Two vacuum hoses from Evaporative Emission Thermal Vacuum Valve (EVAP TVV).
3. EVAP TVV from intake manifold.
INSPECT
EVAP TVV for proper operation using the following steps:
^
Cool EVAP TVV by placing in water and cooling to 35°C (95°F). Check the air does not flow from the upper port to the lower port. If
operation is not as specified, replace EVAP TVV.
^
Heat EVAP TVV by placing in water and heating to 54°C (129°F). Check that air flows from the upper port to the lower port. If operation is
not as specified, replace EVAP TVV.
INSTALL OR CONNECT
1. Apply RTV SILICON SEALANT, GM P/N 105297 or equivalent to two or three threads of EVAP TVV.
2. EVAP TVV to intake manifold.
3. Two vacuum hoses to EVAP TVV.
^
Refill engine coolant to proper level.
4. Negative (-) battery cable. Tighten negative (-) battery cable-to-negative (-) battery terminal retainer to 15 Nm (11 lb. ft.).