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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
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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
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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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