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Isuzu
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1987
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I-Mark L4-1471cc 1.5L
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Repair and Diagnosis
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Powertrain Management
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Emission Control Systems
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Evaporative Emissions System
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Thermal Vacuum Valve - EVAP
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Description and Operation
Thermal Vacuum Valve - EVAP: Description and Operation
The
thermal vacuum valve
is connected in series with the purge signal line. It prevents vapor purge during engine warm-up under very cold driving conditions.