momo1502

i have a 2002 IS300 auto. I gave her new spark plugs, coil packs, gaskets and a new ocv at the beginning of the year. my check engine light is on but that is because i have a header and no cats. last week she started to make a funny noise so i got my reader out and it said misfire in the first cylinder. i replaced the spark plugs again and still she sounds like a horrible wrx. any ideas?