I've got an ignition issue when I hit boost, and the car mis fires a bit. I had my head gasket changed to an Athena 1.4mm last week and nothing else has changed, but the car was spot on before the HG was replaced. I was told to check my cap and rotor arm, crappy I phone photos i'm afraid. Do these need replacing? I've tried cleaning them up a bit bit no improvement Cheers Arnold