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.
2003 Saturn LW200FACTORY OEM SERVICE PROCEDURE
Test Procedure
- Test the fuel composition using Fuel Composition Tester (J 44175) and Instruction Manual (J 44175-3).
- If water appears in the fuel sample, clean fuel system and replace fuel filter.
- Subtract 50 from the reading on the DVOM in order to obtain the percentage of alcohol in the fuel sample. Refer to FUEL COMPOSITION TEST EXAMPLES table.
- If the fuel sample contains more than 15 percent ethanol, add fresh, regular gasoline to the vehicle's fuel tank .
- Test fuel composition.
- If testing shows the ethanol percentage is still more than 15 percent, replace fuel in the vehicle.
FUEL COMPOSITION TEST EXAMPLES
| Example | Frequency - Hz | Subtract 50 | Ethanol Percent |
|---|---|---|---|
| A | 50 | -50 | 0 |
| B | 65 | -50 | 15 |
| C | 129 | -50 | 79 |
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.