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'03 XS
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189 Posts
Discussion Starter · #1 ·
Hello all, I have an '08 Forester XT

A couple weeks ago I got a flashing check engine light and pulled the codes and it was cylinder 4 misfire.
We swapped the coil to cylinder 2 and the misfire followed.

We replaced all the plugs and the coil.

The car ran great for 1 day, now has no power and is obviously misfiring pretty bad. Very rough Idle

Now I have 3 different codes
cylinder 1 misfire
PFFFF
PFFFE

Anyone have a clue where to look next?
 

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'03 XS
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189 Posts
Discussion Starter · #5 ·
Thanks, the plugs looked fine.

Cylinder 1 coil was very hard to get off as the boot seemed stuck to the plug.
 
2017 2.5i Fozy CVT
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1,283 Posts
A google search for" subaru pffff" yields some pertinent data on other suby forums.

Ever adjusted valves? Oil burner or not? Miles on ODO?
 

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'03 XS
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189 Posts
Discussion Starter · #7 ·
It had a burnt valve @ 98k
The previous owner fixed that and all related parts

now at 137k and uses no oil

A google search for" subaru pffff" yields some pertinent data on other suby forums.
Yes I've been reading up thanks.

I think the coil might be have gotten damaged when trying to get it off the plug
 

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Registered
'03 XS
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189 Posts
Discussion Starter · #8 ·
UPDATE

I changed out the coil pack and all is well.
The coil boot was stuck on the plug and I must have damaged it when removing it.

I could not tell that the boot was damaged. It was fully seated when I took it off.
 
2017 2.5i Fozy CVT
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1,283 Posts
It is easy to damage anything. When I changed my plugs last, I damaged/cracked an insulator/ceramic portion when I was monkeying around trying to get the right dangle angle for install.

Had to swap it out for the misfire to go away.

Dielectric grease on the boots helps.
 
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