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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System & Fuel System - 5.3L - Troubleshooting & Diagnosis) >> Symptoms - Engine Controls >> Additional Symptoms Tests >> Poor Fuel Economy

Poor Fuel Economy

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Inspect for foreign material accumulation in the throttle bore, and for carbon deposits on the throttle plate and shaft. Also inspect for throttle body tampering.