Genuine Saturn LS1 Fuel Pump

Saturn LS1 Fuel Pump Parts Questions & Experts Answers

• Fuel Tank Meter/Pump SENDER
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  Q: How to remove and reinstall a fuel pump/fuel level sending unit module?

  A: To begin the process, relieve the system fuel pressure and equalize tank pressure by removing the fuel filler cap. Next, disconnect the cable from the negative battery terminal. Then, remove the Fuel Tank. After that, disconnect the fuel supply and return lines from the fuel pump/Fuel Level Sensor, using a shop rag to soak up any spilled fuel. Mark the orientation of the fuel pump in relation to the fuel tank to ensure correct realignment when reinstalling. Using a pair of large water pump pliers, unscrew the fuel pump/Fuel Level Sensor locknut. If the locknut is tight, carefully tap it loose with a hammer and a brass punch. Carefully remove the fuel pump/Fuel Level Sensor from the fuel tank, taking care not to damage the fuel inlet strainer or the fuel level sensor float arm and float. Before installing the pump, inspect the O-ring for cracks, tears, and deterioration, and replace if necessary. Also, inspect the fuel pump inlet strainer and clean it if dirty. Installation is the reverse of removal, making sure not to damage the fuel inlet strainer, float arm, or float. Finally, when the battery has been disconnected, the Powertrain Control Module (PCM) must relearn its former driveability and performance characteristics.
• Fuel Pump Assembly
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  Q: How to check the fuel pump operation and fuel pressure for Saturn LS,LS1?

  A: The fuel pump operation can be checked by listening for a soft whirring sound when the ignition key is turned ON. If the pump does not come on, check the fuel pump fuse, relay, and wiring. To check fuel pressure, locate the Schrader valve test port and connect a fuel pressure gauge. Start the engine and note the gauge reading. If pressure is lower than specified, suspect a restricted fuel filter or blockages in fuel lines. If the pressure regulator is okay, the fuel pump module or Fuel Injectors may be clogged or defective. If pressure is higher than specified, check the Fuel Pressure Regulator or return side fuel lines. After turning off the engine, verify that fuel pressure does not lose more than 8 psi in five minutes and check for any fuel leaks when starting the engine.
• Fuel Pump Kit
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  Q: How do you disassemble the fuel pump/fuel level sensor module for Saturn LS,LS1?

  A: To disassemble the fuel pump/fuel level sensor module, start by removing it from the vehicle. Disconnect the fuel level sensor leads from the harness clips on the side of the module. Disconnect the positive and ground wires from the top of the fuel pump and detach the connector housing from the bottom of the fuel pump cover. To remove the fuel level sensor unit, depress the locking tab and slide it until it's free of its retaining rails. Installation is the reverse of the removal.