Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2005OPTRA5 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - 1.8L (L79) - INTRODUCTION AND MECHANICAL REPAIRSDESCRIPTION AND OPERATIONFUEL SYSTEM DESCRIPTION (NON EUROPEAN EMISSIONS)FUEL CONTROL SYSTEM OPERATIONFUEL CUT-OFF MODE
2005 Chevrolet Optra5 Base, Standard
Fuel Cut-Off Mode
2005 Chevrolet Optra5 Base, StandardSECTION Fuel Cut-Off Mode
No fuel is delivered by the fuel injectors when the ignition is OFF. This prevents dieseling or engine run-on. Also, the fuel is not delivered if there are no reference pulses received from the CKP sensor. This prevents flooding.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.