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hi guys, i have had my impreza for around a month now and it has a slight misfire.
the missfire is constant, its there from cold and stays when warm, you can feel it all the way through the gears and rev range, it doesnt matter how much load the car is under its allways there.
Coilpack and/or HT leads I reckon. The new plugs seem like they've restored some of the spark, but old coilpack and/or leads obviously preventing it sparking fully...