Genuine Mitsubishi Galant Fuel Pump

Mitsubishi Galant Fuel Pump Parts Questions & Experts Answers

• Fuel Pump
  MR990817
  Q: How to remove and install the Fuel Level Sensor and Fuel Pump on Mitsubishi Galant?

  A:

  To remove the fuel pump, relieve the system fuel pressure and disconnect the cable from the negative battery terminal. Then take out both the rear seat cushion and the fuel pump service cover. For models from 1994 to 1998, except for California models, you should disconnect the fuel pump electrical connector. Then disconnect the fuel supply line and the fuel return hose. Take out the fuel pump retaining bolts and withdraw the fuel pump assembly from the fuel tank slowly and carefully, discarding the old gasket if replacing. For California models 1994-1998, the fuel pump and fuel level sending unit is an assembly. The procedure for removal or installation is the same as for non-California vehicles. For models commencing from 1999, proceed to remove the cover for the fuel pump service hole, then disconnect the wire harness. After which, proceed to disconnect the fuel supply line and the fuel return line. Take off the lock ring and gently pull the fuel pump/fuel level sending unit assembly out of the tank while checking the rubber seal for damage. For installation, clean the area surrounding the fuel tank opening and install a new gasket for 1994-98 model years. For models 1999 and later, the rubber seal should be installed into the opening of the fuel tank after being lubricated with a clean engine oil. The fuel pump/fuel level sending unit is inserted slowly into the tank. For 1994 through 1998 models, install the mounting bolts. For 1999 and later models, align the arrows on the fuel pump and the tank. Secure the ring nut but do not over-tighten. The remaining installation steps are the opposite of the removal step.
• Fuel Pump Assembly
  MR508283
  Q: How to check Fuel Pump pressure and diagnose Fuel Pump delivery issues on Mitsubishi Galant?

  A:

  To measure the fuel pressure, a gauge that can measure up to around 70 psi is necessary. An adapter will be required to tee into the fuel supply line at the Fuel Rail because a Schrader valve type test port is not present in the fuel rail. You should check the battery, fuel pump fuse, fuel filter for restrictions, and all fuel lines for leaks if you suspect poor fuel delivery. Check the operation of the fuel pump Place the transaxle in Park (P) or Neutral (N) and apply the parking brake. Remove the fuel filler cap. Have someone turn the ignition key to the ON position and listen for a whirring noise. If the pump does not spin, check the fuel pump relay, which differs in location depending on model year. When the relay is good, but the pump doesn't run, check for voltage to the pump while cranking the engine. If your wiring and connectors are good, then the fuel pump is faulty. To find the fuel pressure, you need to relieve the pressure from the system then use a T-type adapter then attach the gauge at the fuel supply line at the firewall. With everything checked for leakage, turn ignition key to ON to pressurize the system. Now start the engine and note the gauge reading. In the event that the pressure is lower than specified, pinch off the fuel return line and again turn the key to ON, ensuring that no concentration in the specified pressure is maintained for so long. Should the pressure exceed the designated range, consider changing the Fuel Pressure Regulator. But if the pressure remains on the lower side, check for leaks in the Fuel Injectors, filter and lines. Also check the fuel pump inlet strainer and wiring. Check return line for restrictions. If pressure is higher than specified, replace the regulator. While the engine is idling, disconnect the vacuum hose from the fuel pressure regulator and check whether the pressure drops accordingly. If the pressure does not drop, verify that there is vacuum and replace the regulator if necessary. Ultimately, after taking the measurements, relieve the fuel pressure, remove the gauge, and reconnect the fittings.