I have had a problem with Cylinder 3 missfire on my 02 WRX for a while now. It started happening awhile ago, and every time I would do something like replace the spark plugs, fuel filter, tighten fuel hoses, the CEL would go off and every thing would seem good. Also of note is the first couple of times this happened I did not feel any difference in the way my car drove. But just recently the CEL came on and this time I could definitely feel that my car was suffering. I plugged my Cobb access port in and read the code. sure enough Cyl 3 missfire. The engine also picked up a fluttering noise and doesn't seem to have nearly as much power as it did. I have heard that it is probably the distrib caps on top of the spark plugs. But I wanted to confirm this with the WRX community before going out and dropping $650 on new caps.