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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel Systems >> Fuel Pump Electrical Circuit Diagnosis >> Diagnostic Aids

Diagnostic Aids

Listen for an audible hiss from fuel pump when fuel pump relay is commanded on. A vibration in the fuel feed line when fuel pump relay is commanded on indicates that the fuel pump is operating.

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