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 MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 342 (ENGINE CONTROL SYSTEM - 3.5L - TROUBLESHOOTING & DIAGNOSIS)FUEL SYSTEM DIAGNOSISCIRCUIT/SYSTEM TESTING
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Circuit/System Testing
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Turn OFF the ignition.
- Relieve the fuel pressure. Refer to Fuel Pressure Relief Procedure .
- Disconnect the chassis fuel hose from the engine compartment fuel pipe. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
- Install the J 37287 between the chassis fuel hose and the engine compartment fuel pipe.
- Open the valve on the J 37287 .
- Turn ON the ignition, with the engine OFF.
- Command the fuel pump relay ON with a scan tool.
- Bleed the air from the J 34730-1A . See Special Tools .
- Command the fuel pump relay ON and then OFF with a scan tool.
- Close the fuel feed pipe shut-off valve.
- Monitor the J 34730-1A
for 1 minute. See Special Tools
.
- If the fuel pressure remains constant, replace the fuel sender assembly.
- If the fuel pressure does not remain constant, locate and replace the leaking fuel injectors.
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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.