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Home >> Lexus >> 2000 >> RX 300 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - System & Component Testing >> Fuel System >> Fuel Cut System Operation
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Fuel Cut System Operation

Remove engine cover. Start and warm engine to operating temperature. Turn A/C off. Use a stethoscope to listen for injector operating noise (or feel for vibration with finger). Increase engine speed to at least 3500 RPM. Release throttle lever. When throttle lever is released, injectors should stop operating momentarily until engine speed decreases to 1200 RPM. Shut engine off. Remove scan tool.