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Fuel Pump Flow Test

NOTE: If scan tool is not available use following procedure to operate fuel pump On. Remove fuel pump relay from underhood fuse/relay box. Using fused jumper, jumper fuel pump relay socket cavities No. 1 and 5. See Figure .

If fuel flow or supply problem is suspected, perform following:

  1. Turn ignition off. Ensure A/C is off (if equipped). Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE  . Remove fuel feed pipe to fuel rail. Place fuel feed pipe into an appropriate sized clean container. Connect Tech 2 or equivalent scan tool to Data Link Connector (DLC). DLC is located under small cover on left side of dash. Turn ignition on. Using scan tool, command fuel pump On.
  2. Fuel pump should run, and in 15 seconds deliver at least .40 qts. (.38 ltrs.). If fuel pump does not perform as specified, check for plugged fuel filter, kinked or blocked fuel lines. If problem is found, repair as necessary. After repair, recheck fuel pump delivery.

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