Question about 2004 Subaru Outback

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2000 Subaru Outback will not Start/Run in the Cold

I own a 2000 Subaru Outback 2.5L and it has 174K miles on it. I have owned it for three years now and it has always had issues with starting in the cold (temperatures under 35 F). I am located in the Pacific Northwest and live in Vancouver, Washington, which does well to keep slightly above this degree, but the weather still dips below causing my frustration. When turning the engine over, the starter will continue without turning the engine over 90% of the time. In the few times it does turn over, the engine runs extremely rough and will die. Attempting to turn the engine over again will end with the same result leaving my family and I stranded. I have replaced quite a few parts including: fuel filter, fuel pump, battery, each part included in a tune-up multiple times, and I keep up with the oil changes. I had the injectors flushed out at a local shop, which increased my acceleration when the car is running, and they told me a pressure relief valve (name may be incorrect but the action is important) on the fuel pump needs to be replaced. The valve is not leaking fuel but allows air into the line making the fuel drain back into the fuel tank causing longer turn-over times since the pump has to fill the line again to reach the injectors. My question is to individuals who are mechanics and who may have dealt with this same or similar issue, does this sound like a reasonable fix to the problem? I have been dickering with this issue for far too long, though I have been putting it on the back burner at times, and I would like some outside opinions. Any help is appreciated, and thank you in advance.

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Posted on Feb 07, 2014

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thaurfen
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SOURCE: Fuelpump problem 2000 Suburu outback

check fuel lines for leaks...
good luck

Posted on Aug 16, 2008

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SOURCE: intermittant stalls & rough idle

i would say maf 2

Posted on Dec 29, 2008

shawnsz
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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

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