Just bought my 06 TACO with VVT 2 weeks ago. I've noticed that the idle jumps up very slightly (maybe 200 rpm) when I'm sitting at a light and have the fan on (not necessarily the AC). It will jump up after 30-60 seconds and stay up for a bit then jump back down. You probably have to sit at idle for several minutes (with the radio off) before you would notice.
I was curious if anyone else has noticed this & it is a typical behavior.
I was curious if anyone else has noticed this & it is a typical behavior.