G'day, few things. Just recently bought an XR6, drives well, but just wondering a few things.

1) Noticed the revs would fluctuate very slightly on idle, is this normal? Doesn't matter if its cold or warm, also does it when driving.

2 Just cleaned the Throttle Body, thinking it would fix the slight fluctuation in RPM (didn't) Didn't take the Throttle Body off, just cleaned it as it sat. Do I still need to reset the ECU? Also have noticed a sound after cleaning it, when I took it for a drive, similar to an Induction sound when accelerating.

Cheers!