I recently bought a 2002 WRX and about 2 weeks into owning it the check engine light came on with a Misfire on cylinder one code. I then decided to start with the most simple fix, change the spark plugs. The car ran better for about two days until I decided to really wind it out then the CEL came back on. After the second time the light came on I decided to change the cylinder one coil. After I changed the coil it rain well for about a week then the CEL came on once again, this time with misfires on cylinders 1, 3 and 4. Any ideas as what this could be? Any help is greatly appreciated. Thanks!