Question about 2003 Subaru Outback

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How often should the spark plugs be changed in a 2003 subaru

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Around every 20-k miles

Posted on Jul 27, 2009


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2003 subaru outback sedan my car backfires while driving down the road whats wrong with it?

I had a problem similar and the HV cables to to the spark plugs were crossed and one was open circuit as in broken inside cable.

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If you are saying it takes a long time to start the engine, have you checked fuel pressure before and after cranking ?

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I have a automatic 2003 Subaru legacy L 108,000 miles, I had new belts and a water pump replaced last year, I just had the spark plugs changed. When I try to accelerate, it is very slow and the car revs...

My guess would be either the transmission fluid and filter needs to be srviced or the transmission is having a issue with the shift linkage.. Does it improve when the car warms up ?

May 30, 2012 | 2003 Subaru Legacy

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How often do have to replace spark plugs on a Subaru Forester 2.5x 2004 model.

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May 26, 2011 | 2003 Subaru Forester

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I have a 2003 Subaru Baja with 126k. Recently has developed what I thought to be a misfire. When I pulled the spark plugs they were loose and covered with oil. I changed the wires and plugs and still have...

I would replace the filter and verify the fuel pressure. should be 30-40psi but I dontt have the exact spec. The oil in the plug tubes may be caused by leaking valve cover gaskets.

Sep 06, 2010 | 2003 Subaru Legacy

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I have a 1990 Subaru Legacy no spark on 3&4 changed ecm and icm still no spark on those two coils

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Feb 24, 2010 | 1990 Subaru Legacy

1 Answer

2003 outback, check engine light is on, car feels like it's misfiring (sputtering) vehicle has 70k miles

any bad fuel in your area,low petrol recently,,may need to get dealer or good mechanic to pull fault codes from computer,not expensive to do,but repair depends on fault,need to look further,any car situation changes recently that may explain it,may be simple like spark plug lead

Oct 17, 2009 | 2003 Subaru Outback

1 Answer

My 2003 subaru forester idle very rough. if you open the hood and look at the engine it is shaking like its firing on only three cylinders. I need some help.I changed the spark plugs, gas filter, air...

1) Check all the vacuum hoses for a leak in the rubber hose or a hose that isn't connected. Vacuum leaks cause motors to shake and stumble on acceleration.
2) There's a plastic T connection on the back side of the engine behind and under the air cleaner box. That T connector joins together three air hoses of different sizes and is prone to breaking from heat stress. Only a Subaru dealer will have this part.
3) Even though the spark plug wires are new, you may have a bad one. Don't waste your money on cheap parts; they cost more in the long run.
Good luck!

Apr 23, 2009 | 2003 Subaru Forester

1 Answer

2002 subaru ll bean 6cyl-spark plug replacement

Since it is a horizontally opposed four cylinder engine, the spark plugs are basically installed the same way (horizontal to the ground, in line with the pistons) Two are on the left, two are on the right. The coilpacks replace the conventional spark plug wires. You will need to remove the coilpacks to access the spark plugs. You will also have to remove the intake airbox to reach the left two spark plugs, and you will have to remove the windshield washer fluid reservoir to reach the other plugs. This is very time consuming... the right tools make it much easier. Make sure you get the oem replacements, otherwise your car may not run well.

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Mar 29, 2009 | 2003 Subaru Outback

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