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.
2006 Pontiac Wave Base, 4D Sedan, Y4M/MLMFACTORY OEM SERVICE PROCEDURE
Engine Controls - 1.6L (L91) - Troubleshooting & Diagnosis
- Symptoms - Engine Controls
- Engine Cranks but Does Not Run
- Fuel System Diagnosis
- Fuel Pump Electrical Circuit Diagnosis
- Fuel Injector Coil Test
- Fuel Injector Balance Test with Special Tool
- Fuel Tank Leak Test
- Alcohol/Contaminants-in-Fuel Diagnosis (w/o Special Tool)
- Alcohol/Contaminants-in-Fuel Diagnosis (w/Special tool)
- Intake Manifold Tuning (IMT) Valve Diagnosis
- Electronic Ignition (EI) System Diagnosis
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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