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Subaru engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1990 Subaru Legacy - Engine - 12/4/2013
    No start issue. It acts like it wants to start and has spark.
    I've determined it to be a fuel issue, probably the pump. But first i want to check the relay, but not sure the location.
     
    • HouseCallAuto
      12/4/2013 HouseCallAuto
      Unless you already did, replace the coolant temperature sensor. This sensor on the old Subaru failed often and gave hard start issues. Do not replace the fuel pump unless you have a clear diagnosis of the pump either not turning on or it is producing low fuel pressure. Fuel pressure should be 26 to 30 psi at idle and higher during cranking before it starts. Maximum 37 psi
  • RoseofSharon
    RoseofSharon - 1995 Subaru Legacy - Engine - 11/30/2013
    Why does my car idle fast when I come to a stop, but goes back to normal when I hit the gas pedal?
    When I start the car the idle is fine, but after I've been driving, the engine races at about 1000 to 1500 rpms at a stop. To make the engine stop racing, I press the gas pedal to the floor and back real fast. Then it idles fine until the next time I stop. I don't ...
     
    • HouseCallAuto
      11/30/2013 HouseCallAuto
      The throttle body has to be cleaned and examined for any reason for binding, like an out of adjustment throttle cable.
  • AutoMD Member
    AutoMD Member - 2010 Subaru Forester - Engine - 11/6/2013
    My oil was low and my check engine light came on along with my cruise control light and traction control light.
    I added oil. When the car cools off the lights go off. When it heats up, the lights come back on.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1988 Subaru GL - Engine - 10/29/2013
    Engine stops while driving
    car has new fuel pump,fuel filter, coil , after stopped for a few min. starts & goes sometimes just a few feet or a few miles!
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2009 Subaru Impreza - Engine - 10/27/2013
    Using engine oil, 1 litre per 2000 miles.
    hi, my car has done 30000 miles and has recently stated using engine oil, about 1 litre in 2000 miles, can any one help please.
     
    • CVO
      10/27/2013 CVO
      Worn valve stem seals will allow the engine oil to penetrate into the combustion chamber. Normally the oil consumption occurs in the engine with a higher mileage ( 70,000 miles ).See this site for valve stem seals.
      https://www.google.com/search

      Note: use the engine restore oil, it does help to reduce the oil consumption but not a 100% seal it.
  • 1wayralph86
    1wayralph86 - 1999 Subaru Legacy - Engine - 10/14/2013
    My car is over heating after i replaced radiator, water pump, an thermostat. I was told that its air locked.
    219876, running hot, it runs hot while driving, it just started two days ago,inside the car, yes check engine light is on,no other lights are on.
     
    0 answer
  • HDAVILA5
    HDAVILA5 - 2007 Subaru Outback - Engine - 10/7/2013
    Where do I find the O2 sensor relay?
    I need to find the O2 sensor relay to test it and see if it is the culprit for the steady Check Engine light and blinking cruise control light that comes on and disables the cruise control. This problem has been happening since the car was brand new and the ...
     
    0 answer
  • Ldonald100
    Ldonald100 - 2004 Subaru Forester - Engine - 10/2/2013
    Why did the fan for heat and air conditioning stop working?
    125,000 miles - the output for heat, air and vent does not produce any air movement.
     
    • CVO
      10/2/2013 CVO
      1.Check the fuses F/B # 1, F/B # 2 and F/B # 17.
      2. Test the blower, apply a 12 volts direct to the blower connector and if it works.
      3. Check the blower motor fan relay.
  • samuchawe
    samuchawe - 2001 Subaru Forester - Engine - 9/29/2013
    What could make this type of the vehicle to consume more fuel even when you are driving slow at 40km/h
    100000 mileage we have changed the plugs
     
    • HouseCallAuto
      9/28/2013 HouseCallAuto
      Did you monitor fuel mileage and get a miles per gallon number?
    • Jimm
      9/29/2013 Jimm
      Here are a few engine problems that hurt fuel economy:
      - missing or defective thermostat, causing low operating temperature
      - clogged intake manifold exhaust crossover passage (for heating intake manifold)
      - engine misfire caused by bad spark plug, ignition wire, coil, dist. cap or rotor
      - late ignition timing
      - bad vacuum advance unit (common in old cars)
      - stuck centrifugal advance mechanism in distributor (needs oil occasionally)
      - bad tension adjustment of centrifugal advance springs (inside dsitributor)
      - defective oxygen sensor (causes rich mixture)
      - defective coolant temperature sensor for engine computer (causes rich mixture)
      - worn timing belt (may cause rich fuel mixture in fuel injected cars with a MAP sensor)
      - incorrect timing belt installation (timing marks should line up)
      - dirty mass air flow sensor (causes rich mixture)
      - dirty air filter (causes rich mixture at high power)
      - clogged or defective PCV valve
      - incorrect valve clearance (especially if too tight)
      - worn valve guides (makes fuel mixture too lean at low power)
      - vacuum leak from bad vacuum hoses or intake system gaskets (causes lean mixture)
      - dirty fuel injectors
      - bad fuel pressure regulator
      - bad MAP sensor for fuel injection
      - leaking intake duct between air flow sensor and throttle body
      - rusted or missing exhaust heat stove or pipe for heated air intake
      - loss of compression pressure due to worn rings or leaking valves
      - sticking EGR valve (causes rough idling and rich mixture on some engines)
      - increased exhaust back pressure caused by clogged catalytic converter, muffler or crushed pipe
      - stuck exhaust manifold valve for some engines. Intended for fast warm up.

      Other than these list of engine problems; there are other possibilities -
      fuel system leaking, low tire pressure, wheels mis-aligned, brakes dragging / not fully retracted
  • alleyneben1
    alleyneben1 - 2006 Subaru Impreza - Engine - 9/20/2013
    Timing Belt needs to be replaced vehicle has 46000 miles and is well maintained.
    Is this vehicle under recall my daughter has a 2008 and had the same problem which was covered under a Recall Notice ??
     
    • Jimm
      9/20/2013 Jimm
      Check the applicable recalls on the follwoing websites; www.AutoMD.com, www.arfc.org. Looks like there are only two (2) recalls for the 2006 Subaru Impreza - one for the air bags, and one related to the front suspension / front lower control arm.

      The timing belt replacement is usually at 60k intervals - though at 46k miles it would not hurt to replace. Be sure to go ahead and replace the water pump at the same time - the water pump is usually included in the timing components kit. Check the many on-line auto parts sources, such as; www.autopartswarehouse.com, wwwpartsgeek.com, www.autoanything.com and www.rockauto.com - to list only a few sources. For example, they (Rock Auto) list the timing component kit from around $181.00 for your vehicle. Gates part # TCKWP304A Premium OE Timing Belt Component Kit W/Water Pump; 6 Components (1 Belt, 1 Hydraulic Tensioner, 3 Idlers, 1 Water Pump)
      Keep in mind that the 2.5L flat six cylinder is an interference engine application - meaning that if the timing belt should break in operation, the pistons will contact the valves and major engine damage will occur.
  • 8493309
    8493309 - 2008 Subaru Impreza - Engine - 9/11/2013
    2008 subaru impreza wrx. i replace the a/c compressor and need to know about adding oil to it. do i use the oil that i p
    2008 subaru impreza wrx. i replace the a/c compressor and need to know about adding oil to it. do i use the oil that i pour in directly, or the one i put in from the high or low port. and is it pag-46?
     
    • wbrockstar
      9/10/2013 wbrockstar
      Yeah you add the oil the same way you do with freon,through the low pressure side.Some R-134 kits have the freon and oil in 1 can or you can purchase oil seperately
      wbrockstar
      9/11/2013 8493309
      Thanks. DO you know how much oil to add?
    • wbrockstar
      9/11/2013 wbrockstar
      I believe the can comes in 8oz portion.Put the whole can in the compressor
  • dttd123
    dttd123 - 2002 Subaru Impreza - Engine - 9/10/2013
    Car does not start . Turn key sometimes clicks sometimes nothing .
    Just happened started happening yesterday. happened a bunch of times today i did the drop clutch technique to start car. Starter clicks sometimes , one time it started clicking more then usually on one key turn. hit starter alot ! and still wouldn't start. ( ...
     
    • bear.1216
      9/10/2013 bear.1216
      You have a weak battery or a dead starter. Have the battery tested if it is good then replace starter.
  • 8493309
    8493309 - 2008 Subaru Impreza - Engine - 9/9/2013
    2008 subaru impreza wrx. i replace the a/c compressor and need to know about adding oil to it. do i use the pag-46 that
    2008 subaru impreza wrx. i replace the a/c compressor and need to know about adding oil to it. do i use the pag-46 that i pour in, or the one i put in from the high or low port.
     
    0 answer
  • mtnspool
    mtnspool - 1999 Subaru Forester - Engine - 9/9/2013
    Emergency flashing lights switch- Where is it located?
    My car has not been running in a few months and the emergency lights keep flashing. Where is the switch so I can remove it. It is on after engine is off.
     
    • bear.1216
      9/9/2013 bear.1216
      The flashing lights may be the security system. When a car sits for a long time the battery will get weak and the security system can turn on making the lights flash and may disable vehicle. You may need to reset the alarm. The hazard switch is on the dash or steering column. Removing the switch may not disable lights if security issue It has the symbol of a triangle with a lightning bolt inside. If you want to disable the hazards it would be easier to pull the hazard relay or fuse. This will disable hazard lights. Sorry but I cant tell how to disable or reset security system. I dont teach people how to steal cars.
  • mtnspool
    mtnspool - 1999 Subaru Forester - Engine - 9/8/2013
    No longer have wireless key-battery changed out and lights are flashing
    Where is the switch under the dash for my 1999 Sub Forrester so I can turn off lights?
     
    0 answer