Question about 2003 Subaru Forester

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

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100,000 miles or less-use OEM copper plugs and NOT platinuim.

Posted on May 26, 2011


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2004 Subaru forester turns over but won't start. Battery is fine, replaced coil pack still no luck

you need to check for fuel pressure next.
Could be many things, but a fuel pump or fuel pressure regulator would be prime suspects.

Dec 28, 2016 | 2004 Subaru Forester

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How to replace rear differential carrier bearing without removing differential?- 2004 subaru forester

I can't see how that is possible given what needs to be removed to access the bearings. The rear diff is not very difficult to remove from the car

Aug 09, 2014 | 2004 Subaru Forester

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Hello, my 2004 subaru forester cross sport is burning a rich mixture hence consuming alot of fuel (15MPG). What is the cause of the problem and how may i fix it?

i suspect the oxygen sensor might be getting old. Most subarus run a bit rich but not like that. If the maintenance is up to date items like the fuel filter, spark plugs and airfilter are not causing this then the most common item is the oxygen sensor.

Aug 19, 2011 | 2004 Subaru Forester

2 Answers

How do i replace spark plugs on 2004 subary forester

Replace one at a time. Don't remove all the wires at once or the firing order will be messed up.
Make sure spark plug area is clean so no debris will fall inside the cylinder.
Remove plug wire by pulling it off by the boot and not the wire itself.
Then with extension(s) spark plug socket and socket wrench, turn them counter-clockwise until they are out, put new plug in and tighten clockwise. It may be easiest to start them by using your hand instead of the socket wrench itself. Make sure they start going in fairly easily. If they feel tight right away, the threads may not be seating right and they can get cross-threaded.
Tighten completely, don't over tighten but not loose, just snug. Then push boot from plug wire back on and move to the next one.

Apr 30, 2010 | 2004 Subaru Forester

2 Answers

2000 subaru forester ignition coil wiring

Are there any other possible problems, or you are just not receiving spark at all now?

The coilpack could be dead and just need replaced. If you have a voltmeter or a test light, check the wiring on both sides of the coilpack harness to make sure it is receiving power.
I don't believe Subaru used ignitors past '99, but if they did, your should be located on the firewall behind the throttle body. Make sure it's plugged in and receiving power.

Coil packs do go bad from time to time. I had to replace mine in my
'98 Impreza a while back.


Mar 15, 2010 | 2000 Subaru Forester

2 Answers

Subaru Forester 1999 GLS spark plug gap?

spark plug make= ngk
plug type =BKR6E-11

Dec 30, 2009 | 1999 Subaru Forester

1 Answer

2004 Subaru Forester: Can you safely install spark plugs without a torque wrench....just by using the "hand Tighten" directions on the package (1/2 to 2/3 turn)?.....Is the forester an iron or aluminum...

04 probly aluminum but i change spark plugs all day at work and just make sure there tight you dont need a torque wrench to put them in just sinch them down you will be fine.
good luck

Aug 24, 2009 | 2004 Subaru Forester

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