Test Procedure
- Test the fuel composition using J 44175 Fuel Composition Tester and J44175-3 Instruction Manual. See Special Tools .
- Subtract 50 from the reading on the DMM in order to obtain the percentage of alcohol in the fuel sample. Refer to Fuel Composition Test Examples .
- If the fuel sample contains more than 15 percent ethanol, add fresh, regular gasoline to the vehicle's fuel tank.
- Test the fuel composition.
- If testing shows the ethanol percentage is still more than 15 percent, replace the fuel in the vehicle.
Fuel Composition Test Examples
| - | Frequency (Hz) | Subtract 50 | Ethanol Percent |
|---|---|---|---|
| Example A | 50 Hz | -50 | 0 |
| Example B | 65 Hz | -50 | 15 |
| Example C | 129 Hz | -50 | 79 |