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Obtaining Fuel System Sample
- A fuel sample should be taken from several locations in the fuel system. An approximate 1 cup sample should be obtained from before the fuel filter, after the fuel filter, fuel injection pump return, and fuel rail return.
- The samples should be immediately checked for hard particle debris, cloudiness, color, and off odor. Then the samples should sit in a dust free environment for at least 2 hours to look for any separation.
- Disconnect the appropriate fuel feed or return line quick-connect fitting. Refer to QUICK-CONNECT FITTINGS
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- Install the appropriate Fuel Line Adapters / Fitting from the (special tool #8978A, Decay Tool, Fuel). Route the opposite end of this hose and bottle to a secure location.
- Using a diagnostic scan tool, activate the fuel pump until 1 cup of fuel is obtained.