If anyone has any ideas please advise. It started 4 days ago with a little misfire then as car warmed up it was worse then at idle in gear it was very noticeable they it threw on the check engine light. took it to a friend mech. pulled the codes said misfire cyl. 1 so I bought a new coil pac and plugs for #1 and replaced them reset the light next day same thing started out slight miss then worse now light checked code again same misfire #1 even now when car starts up runs smooth when driving no mis only when its warm and at idle. Thank in advance I know I will get some very helpful advice. I don't post on here much but read all the time.