can someone help me solve this problem?..

[allyoucaneat_talon]

Motor have a ticking nose. I had just rebuilted my head one month ago and replaced my block cause it had a bad rod bearing. My motor tick really loud when it idle around 1000 to 1800 rpm, but when i rev or drive past over 1800 rpm it doesn't knock anymore. It run perfectly fine after that. Motor knock while it is cool and warm. Plus the car misfire sometime. May that be a problem also? So can some plz help me. Thanks alot.

P.S. I drive a 2Gen tsi awd.

Mods= 3 inch Apexi catback, 14B turbo, cone filter