Will to start i've had a clicking noise under acceleration for the longest time.I've always thought it was my turbos,But now i've replaced them and I also have a new motor,I have a auto,and under light/Med pressure the rpms go past little past 2k and then the next time it reach 2.5 i hear just one click,I can't make it do it every time,but most of the time,I've haven't tried under hard acceleration cause i'm breaking in the motor.I hope it's not anything seroius,i think it could be some type of vavle,but i really don't know

 

I noticed that on my car today too. Mine is very faint. I wonder if it has to do with the throttle system...