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Isuzu
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1999
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Trooper V6-3.5L
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Repair and Diagnosis
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Powertrain Management
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Fuel Delivery and Air Induction
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Fuel Filler Cap
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Description and Operation
Fuel Filler Cap: Description and Operation
Fuel filler cap
includes vacuum valve and pressure valve.
In case any high vacuum and any high pressure happen in tank, each valve works to adjust the pressure to prevent the tank from being damaged.