I recently acquired a 2005 Impreza WRX with 97xxx miles. I currently have a cylinder 1 miss that's relatively small, but noticeable when accelerating in second and third. I recently did plugs (NGK BKR6EGP), swapped coils on one and three, swapped injectors on one and three. Nothing has made a noticeable difference or brought the miss with it. I did a compression test and numbers were all similar from 148ish. It is also throwing a code for high exhaust gas temp which I assume is upstream o2 sensor. My next steps is to do the oxygen sensor and check coil pack wires to see if power is intermittent. Some advice would be greatly appreciated!