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Cylinder Misfire 3 and 4

5266 Views 4 Replies 4 Participants Last post by  johnnyidaho14
I have a 1999 subaru legacy outback. I had the check engine light come on codes reading P0303 and P0304.

I have changed the spark plugs and spark plug wires as well as the ignition coil. But the problem has persisted. Any suggestions? The car has lost a lot of power and is rattling while it idles.
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On the Super Mod Squad
2002 3.0 VDC Wag + 2018 2.5 Leg Ltd
Joined
26,929 Posts
head gaskets done or undone,? (any overheating, or smell of coolant at the exhaust)?

engine grounds,...all nice and clean?
 

On the Super Mod Squad
2002 3.0 VDC Wag + 2018 2.5 Leg Ltd
Joined
26,929 Posts
another thought,

the alternator on these EJ25D and EJ22 cars was recalled a while back.

subaru made many remans for them and only want $75 for one at the dealer. (parts stores can and will give you a less desireable product).

did you put NGK plugs on? what kind of wires / coil? (NGK, or something subaru sold hopefully).
 
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