Hi, I am driving a 2004 Legacy with the EJ251. I've been having trouble diagnosing the P303 3rd cyl misfire.
I tried changing the wires, plugs, and ignition coil. It went away for four days and then it came back.
I've noticed that it would sometimes turn off during cooler days and it would stay off for like two days before coming back on again. On hot days it would take longer to start and it would come back on.
I've also noticed that when the fuel tank is near empty it turns off and then comes back on when I fill up.
My only conclusion now is possibly the fuel injector. I am planning on replacing it and see what happens.
Any advice and information is greatly appreciated.
Thank You
Goat