Below are instructions for testing the fuel pump operation. You should also test the fuel rail for proper pressure.

These instructions are for step by step troubleshooting the fuel pump. However you might save yourself some time by simply replacing the fuel pump relay first. If that corrects the problem the instructions below will not be needed.

TEST 1:
Does the pump run when 12 volts is applied to the [C] (also see photo at the bottom of this page) or to the fuel pump relay connector, terminal [4]?

• If the answer is NO:
  The problem is with the fuel pump or wiring going to it. No need to test farther until the pump runs with 12 volts applied to the Fuel Pump Test Connector [C].
• If the answer is YES:
  Go to TEST 2.

TEST 2:
Does F.P. Relay connector, terminal [1] have 12 volts when the key is turned to RUN?

• If the answer is NO:
  Check the 15 amp fuse #8 and replace if needed.
• If the answer is YES:
  Test F.P. Relay connector, terminal [2] for a good ground. Repair if needed. Go to TEST 3.

TEST 3:
Does the F.P. Relay connector, terminal [5] have 12 volts when the key is turned to RUN?

Must be tested within a few seconds of turning the key to the run position.

• If the answer is NO:
  Inspect the wiring between relay and ECM -  test/replace ECM if the wiring is good.
• If the answer is YES:
  Replace the F.P. Relay.

Fuel Pump Test Connector Location: