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Subaru engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1998 Subaru Legacy - Engine - 4/4/2014
    Started with a CEL and a PC004 code.
    Replaced plugs and wires. Ran great for three days. Same code pops up and starts running rough again. Low idle produces a flashing CEL and running horrible. Told could be the fuel injector, preparing to replace on the bad cylinder. Any other possibilities? Don't ...
     
    • HouseCallAuto
      4/4/2014 HouseCallAuto
      Please confirm the correct fault code. No such thing as a PC004 or even a P0004 on Subaru. I cannot assist without the correct fault code.
  • AutoMD Member
    AutoMD Member - 2006 Subaru Impreza - Engine - 4/1/2014
    Engine misfire at idle.
    Only 2 cylinders firing at idle. Runs good at higher driving speeds 50-80 MPH.
     
    • Pepe
      4/1/2014 Pepe
      Check your spark plugs, or your ignition coils.
  • AutoMD Member
    AutoMD Member - 1998 Subaru Legacy - Engine - 3/30/2014
    Removal of harmonic pully
    150000 need to know how to remove the harmonic pulley
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2001 Subaru Impreza - Engine - 3/24/2014
    Help with new ECM installation
    There's an immobolizer system involve
     
    • HouseCallAuto
      3/24/2014 HouseCallAuto
      I don't think there is an immobolizer. I think plug and play.
  • AutoMD Member
    AutoMD Member - 1980 Subaru DL - Engine - 3/22/2014
    My cars idle speeds up to almost full throttle after I start driving. Carburetor just rebuilt and cant figure it out.
    When started it idles fine, usually I can rev it a couple times then the idle speed skyrockets. Have adjusted fuel and air mixture and idle speed and no change. If I turn the car off and back off it goes back to an idle. Thank you for any input.
     
    • Jimm
      3/22/2014 Jimm
      Try this repair guide on-line; www.autozone.com/autozone/repairguides/Subaru-ff-1-1300-1400-1600-1800-Brat-1970-1984-Repair-Guide/Carbureted-Fuel-System/Carburetor

      The fast idle may be a combination of: choke adjustment, there is a 1.07 mm gap specification at the throttle plate (slight opening) when the fast idle cam is engaged, when the throttle plate is 16 degrees from full closed, and when the engine is supposed to be at the fast idle speed - typically when the engine first started and cold.

      Here are the fast idle speed adjustment steps;

      1)With the carburetor removed from the engine, set the fast idle cam adjusting lever on the fourth highest step of the fast idle cam.

      2) Check to be sure that the choke valve is fully closed.

      3) Measure the clearance between the lower edge of the primary throttle valve and its bore. The clearance should be the value specified in the Fast Idle chart in this section.

      4) If the clearance is incorrect, turn the fast idle adjusting screw to bring it within specifications. Turning the screw in increases the throttle clearance and vice-versa.
  • AutoMD Member
    AutoMD Member - 1980 Subaru DL - Engine - 3/22/2014
    My cars idle speeds up to almost full throttle after I start driving. Carburetor just rebuilt and cant figure it out.
    When started it idles fine, usually I can rev it a couple times then the idle speed skyrockets. Have adjusted fuel and air mixture and idle speed and no change. If I turn the car off and back off it goes back to an idle. Thank you for any input.
     
    • Jimm
      3/22/2014 Jimm
      Try this repair guide on-line; www.autozone.com/autozone/repairguides/Subaru-ff-1-1300-1400-1600-1800-Brat-1970-1984-Repair-Guide/Carbureted-Fuel-System/Carburetor

      The fast idle may be a combination of: choke adjustment, there is a 1.07 mm gap specification at the throttle plate (slight opening) when the fast idle cam is engaged, when the throttle plate is 16 degrees from full closed, and when the engine is supposed to be at the fast idle speed - typically when the engine first started and cold.

      Here are the fast idle speed adjustment steps;

      1)With the carburetor removed from the engine, set the fast idle cam adjusting lever on the fourth highest step of the fast idle cam.

      2) Check to be sure that the choke valve is fully closed.

      3) Measure the clearance between the lower edge of the primary throttle valve and its bore. The clearance should be the value specified in the Fast Idle chart in this section.

      4) If the clearance is incorrect, turn the fast idle adjusting screw to bring it within specifications. Turning the screw in increases the throttle clearance and vice-versa.
  • AutoMD Member
    AutoMD Member - 2001 Subaru Outback - Engine - 3/21/2014
    Having Cat code come up an a check engine light
    I have had the o2 sensors replaced and the catalytic converter replaced within the past year and I am getting a cat code on the check engine light
     
    • Jimm
      3/21/2014 Jimm
      Need more information - what is the specific fault code? Please post a reply with the fault code for further assistance.
  • AutoMD Member
    AutoMD Member - 2010 Subaru Impreza - Engine - 3/8/2014
    Why did my car smell like burning wire, then check engine light came on
    I have 2010 Subaru impreza, check engine light came on while driving tonight 3/7/14, also the cruise control light keeps flashing on and off I don't even use it and the traction light is on. all three came on at the same time. any suggestions
     
    • HouseCallAuto
      3/7/2014 HouseCallAuto
      Yes, plug in a code reader and see what fault codes are currentky stored in memory. You can obtain a code reader from amazon.com for about $20 with shipping and reading the codes takes a minute with no experience. It can only be diagnosed after knowing the codes. This step cannot be skipped.
    • J&N AUTO
      3/8/2014 J&N AUTO
      You will have either a bad o2 sensor, or Mass air flow sensor. I would also check all lines around the air box for leaks. If you have any more questions feel free to ask.
  • AutoMD Member
    AutoMD Member - 2006 Subaru Legacy - Engine - 3/7/2014
    Should I fix it or sell it?
    My mechanic tells me this car was in an accident before I bought it (not on the Car Fax) and had a piece of the frame replaced. The engine problems I am having will require a new engine at some point. What should I do: 1) Put in a new engine and then sell it? 2) ...
     
    • Jimm
      3/7/2014 Jimm
      Depends on several factors; cost of the repairs, overall value and condition of the vehicle. Given these pieces of information you will be able to make the best decision.

      What are the issues that require a new or rebuilt / replacement engine?
  • AutoMD Member
    AutoMD Member - 2007 Subaru Forester - Engine - 3/4/2014
    What is the whining sound that accompanies this car? Is it the turbo unit or could it be something else?
    Car was fairly recently purchased, mileage about 101500.
     
    • Jimm
      3/4/2014 Jimm
      Yes - it could be the turbocharger or something else. Need more information - when does the noise occur? On start-up, on acceleration - at certain speeds? Have you at least raised the hood to observe any noise / conditions firsthand?
      Difficult to diagnose with any accuracy given the description and lack of details.

      Try using the 'Diagnose' feature on the AutoMD website and then post your reply with as much detail as possible for further assistance.
  • AutoMD Member
    AutoMD Member - 2012 Subaru Forester - Engine - 3/1/2014
    Best way to hard wire fire depart blue lights?
    I am installing FD volunteer blue lights in a 2014 Subaru Forester AWD. The nights need to be hard wired in. Is it possible to use the empty fuse slots to do this?
     
    • Jimm
      3/1/2014 Jimm
      Possible - first check with the manufacturer of the FD lights (there should be information or sticker on the lights themselves for the amerage and voltage required) and also check with the dealership for their recommendations.
      Last thing you want to happen is find out the lights are not working when you need them in an emergency.
  • mellhead
    mellhead - 1992 Subaru Legacy - Engine - 2/25/2014
    Why does my car spit and sputter and sound like small backfires?
    It does this while I am driving it.It also feels like the gas isnt getting to it.I just replaced the fuel filter and did an oil change and tuneup on it.What else could be wrong?Help,I am a single mother of 5 and this is my only way of getting around.
     
    • Jimm
      2/25/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires / plug wires not connected properly
      Weak ignition coil
      Wet plug wires
  • mellhead
    mellhead - 1992 Subaru Legacy - Engine - 2/25/2014
    Why does my car spit and sputter and sound like small backfires?
    It does this while I am driving it.It also feels like the gas isnt getting to it.I just replaced the fuel filter and did an oil change and tuneup on it.What else could be wrong?Help,I am a single mother of 5 and this is my only way of getting around.
     
    • Jimm
      2/25/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • AutoMD Member
    AutoMD Member - 2008 Subaru Impreza - Engine - 2/23/2014
    When it is cold my car will pause then lurches forward . I have been told the valve gaskets leak.
    It has almost 70,000 miles. If I let it warm up for 5 minutes it doesn't happen. The colder it is the worse the lurch is, and it occurs after I drive slowly or not for a tenth of a mile. It occurs every time and the lurch is worse than last winter. I have been ...
     
    • Jimm
      2/23/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
      Jimm
      2/23/2014 AutoMD Member
      Thank you. I will have these ideas checked out. sincerely Patricia
  • AutoMD Member
    AutoMD Member - 2006 Subaru Forester - Engine - 2/21/2014
    Clutch Kit Confirmation
    I found the item on your web site "EXEFJK1001" but am not sure if it is the correct one since I have a 2.0X DOHC engine and it is not shown on your site.
     
    • Jimm
      2/21/2014 Jimm
      There are no auto parts sold directly from the AutoMD website. Please double-check the source of the parts and the correct website.