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Chevrolet
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2003
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Impala LS
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls Troubleshooting - No Codes - 3.8L
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Symptoms
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Poor Fuel Fill Quality
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Fuel Spitback
Fuel Spitback
Check the following items:
Restricted EVAP canister.
High Reid vapor pressure or high fuel temperature.
Ignition switch in RUN position (EVAP vent valve closed).