i have 2000 civic si with b20 vtec .it has wiseco 84mm 10.4-1 pistons and eagle rods .also a all new complete stock redone head. so my problem is that it was running very strong and everything was great and today i went for a drive and it wont rev past 6700 rpm , also i dont think the vtec is even engadging. please help!

scarface843