Problem Diagnosis
I have a 2004 Wrx with a 2007 wrx sti block (so I’m told but think it’s ej 255) and 2014 wrx sti head. (Also think it’s just wrx) Now I have a misfire in cylinders 1,2,4 but it seems to jump around. I’ve changed coil packs, spark plugs, and kind of checked the wires. The car runs perfect until...