Has new plugs/wires 3 weeks ago. k&n stock replacement air filter, new fuel filter a month ago. checked the spark at the coil pack, all four terminals have good spark.good enough to see in bright sunshine. I can hear the fuel pump cycle when the key is turned on. used a scan tool and got knock sensor code and replaced. still no go. rotates STRONG, but won't catch. any ideas, anyone?

Cars & Trucks - Subaru - Legacy - 2001 Subaru Legacy