Question about 2000 Subaru Legacy

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2000 legacy sudden loss of power

2000 legacy runs fine for awhile, suddenly seems fuel starved and I have to barely give it gas to keep running at a much slower speed. Parked the car with engine running and noticed a sucking and clicking sound coming from the right rear wheel-well area, where the fuel tank is located so possibly a sound from the fuel pump mechanism? A diagnostic code tool I borrowed from Auto Zone indicated a possible sensor problem. Could a sensor problem cause the fuel pump to malfunction and the sucking clicking sounds? Also noted that turning the engine off and restarting the car seems to immediately clear the problem for awhile.Happens after driving 20 minutes or so it's kinda like a vapor lock except the car barely keeps running.

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  • Subaru Master
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I'm not sure which sensor your referring to but the fuel pump & regulator are located in the tank. Did anything bang into the car or tank causing it to be on an angle? Get fuel PSI reading while running & stall & go from there. Where is this suction/clicking sound coming from?

Posted on Mar 25, 2017

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Posted on Jan 02, 2017

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SOURCE: 1998 subaru legacy check engine ligt

The codes, you can read.
You can see two plugs, they are pars. One pars of colours green and the other black or white.
you sure the ignition off , Plugs green colours plug them together, attention, only the green and turn ignition but dont start motor. The check engine ligth will flash, the flash long are numbers 10, the flash short are numbers 1.
Example: the check engine ligth flash long 2 times, the code is 20
or flash long 3 times and flash short 4 times the code is 34.
What code it is ??
He comes some codes.
Subaru Code Subaru Trouble Code Description 1 Engine Speed Signal Circuit 11 Crankshaft Position Sensor 12 Starter Signal 13 Camshaft Position Sensor 14 Fuel Injector No. 1 (Legacy, Impreza, Justy, SVX) 15 Fuel Injector No. 2 (Legacy, Impreza, Justy, SVX) 16 Fuel Injector No. 3 (Legacy, Impreza, Justy, SVX) 17 Fuel Injector No. 4 (Legacy, Impreza, SVX) 18 Fuel Injector No. 5 (SVX) 19 Fuel Injector No. 6 (SVX) 21 Engine Coolant Temperature Sensor 22 Knock Sensor 23 Mass Air Flow Sensor Circuit 24 Idle Control System Malfunction 24 ISC Valve (Stick) 24 Open/Short in ISC Valve Circuit 26 Intake Air Temperature Sensor 27 ATF Temperature Sensor Circuit 28 Knock Sensor #2 29 Crankshaft Position Sensor 2 31 Throttle Position Sensor Circuit 32 A/F Sensor #1 System 32 A/F Sensor #2 System 32 Oxygen Sensor 33 Vehicle Speed Sensor 35 CPC System 36 Turbine Speed Signal 37 Rear O2 Sensor Circuit / A/F Sensor Circuit Malfunction 38 Torque Control Signal #1 38 Torque Control Signal #2 38 Torque Control Signal System 38 Torque Permission Signal 39 Traction Control System 41 Air/Fuel Adaptive Control 42 Idle Switch 43 Accelerator Pedal Switch 44 Turbocharging Pressure Control Signal 45 Pressure Sensor 46 Neutral or Parking Switch or Circuit 47 Fuel Injector 48 Lean Burn System 49 CO Resistor 51 Neutral Position Switch 52 Parking Brake Switch (Exc. Justy) 53 Antenna 53 Anti-Quick Operation Mode 53 Communication Error (Time Over) 53 EGI Control Module EEPROM 53 IMM Circuit Failure (Except Antenna Circuit) 53 IMM Control Module EEPROM 53 Key Communication Failure 53 Reference Code Incompatibility 53 Use of Unregistered Key 54 Air Intake System 55 EGR Valve Lift Sensor 56 EGR System 57 Canister Control System 58 Air Control System 61 Air Suction Control Solenoid Valve 62 Exhaust Manifold Valve Negative Pressure Control Solenoid 64 Relief Valve Control Solenoid Valve 1 64 Relief Valve Control Solenoid Valve 2 65 Differential Pressure Sensor 66 Twin Turbocharger System(H) 66 Twin Turbocharger System(S) 66 Twin Turbocharger System(T) 66 Two Stage Twin Turbocharger System 67 Exhaust Manifold Valve Positive Pressure Control Solenoid 68 Turbocharging Pressure Control Output Signal #2 71 Shift Solenoid Valve 72 Shift Solenoid #2 Circuit 73 Low Clutch Timing Solenoid Circuit 74 Brake Clutch Timing Solenoid Circuit Malfunction 75 Line Pressure Duty Solenoid Circuit 76 Brake Clutch Pressure Duty Solenoid Circuit Malfunction 77 Lock-Up Duty Solenoid Circuit 78 Tiptronic Solenoid System 79 Transfer Clutch Duty Solenoid Circuit 81 Torque Up Control Valve 85 Charger System Circuit Malfunction 86 CAN (Communication System) 87 Variable Induction Solenoid Valve Circuit Malfunction 88 Fuel Pump Circuit Malfunction 89 VVT Systems (L) 89 VVT Systems ® 91 TCS Relief Valve 92 Electrical Generation Control Signal Circuit Malfunction 93 Vehicle Speed Sensor #1 Circuit 94 Lateral G Sensor Signal Circuit Malfunction

You sure the finshed job unplugged the plug green
Italo Cabedo

Posted on Sep 30, 2008

  • 75807 Answers

SOURCE: center differential

What you are discribing sure sounds like CV (constant volocity) joint noise from the axle(s), diff's don't make crunching noises, they whine and howl when they go bad, I will say this about your problem, you did not have it before the work was done, so it's a fair guess it has something to do with the work done, make them fix it, do you agree?

Posted on Oct 21, 2008

  • 56 Answers

SOURCE: 93 subaru legacy gt

Check The Vehicle Speed Sensors.

The Legacy has 2 Vehicle Speed Sensors (VSS): VSS1 is located inside of the transaxle; VSS2 is located in the combination meter assembly.


  1. Disconnect the electrical harness from the transaxle.
  2. Connect an ohmmeter across the transaxle's electrical harness terminals 9 and 16.
  3. The resistance should be 450-650 ohms.
  4. After testing, reconnect the electrical harness.
  1. Remove the instrument cluster from the instrument panel.
  2. Disconnect the electrical connectors and the speedometer cable from the instrument cluster.
  3. Connect an ohmmeter or continuity tester across the combination meter terminals 7 and 11.
  4. Insert a small screwdriver in the speedometer cable drive socket.
  5. Rotate the speedometer drive and note the continuity across the VSS terminal. Continuity should turn ON/OFF 4 times per speedometer drive revolution.

Posted on Nov 25, 2008

  • 64 Answers

SOURCE: How do you replace the fuel pump in 1992 2wd Subaru Legacy Wagon

  1. Relieve the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Remove the rear exhaust pipe and muffler assembly.
  4. On All Wheel Drive (AWD) vehicles, remove the rear differential assembly and the rear crossmember. You do not have AWD so this step is not for you
  5. Remove the fuel filler cap and drain the fuel into a suitable container.
  6. Remove the fuel filler pipe protector.
  7. Raise and support the vehicle safely on jackstands.
  8. Remove the fuel filler, air vent and delivery hoses.
  9. On AWD vehicles, disconnect the air breather hoses and evaporation hose from the pipes.
  10. Support the fuel tank with a floor jack or equivalent lifting device.
  11. Loosen the attaching bolts and lower the fuel tank slightly.
  12. Disconnect the fuel pump harness

Posted on Feb 18, 2009

  • 58 Answers

SOURCE: will the knock sensor make any difference to the way the car runs? it has a crack in it.

Your car is not OBD-II, some dealers still have the Subaru Select Monitor required, some haven't kept them. Your local mechanic is unlikely to have spent $2,000 for a tool that only works on 15 to 20 year old Subarus. You can read the check engine light codes without any special tools though, see

The fuel filter is right next to the windshield washer fluid tank.

Posted on Mar 21, 2009

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