Idle fluctuation at speed

[S.T.K.E]

This is something that hasn't really bothered me that much as i don’t really take note of it. But what happens is that when i am cruzing along a main road or high way. It has to be around 75 and above when i lift of the pedal it seems to bounce of the 1k rpm mark. Back and forward between 1200 and 1400. I have upload a video on Youtube to explain.

Now what i was kinda thinking is it due to the fact that it is the factory supercharger keeping up boost at high speeds.....

Can someone possibly fill me in on this topic. Or if it has been happening to anyone else.

YouTube - 09112009

[HoldrodeoLT]

Dirty MAF sensor? Fuel Pump faulty?
My rodeo does this but it surges alot higher and sometimes stalls
and im pretty sure its my fuel pump on its way out...

[S.T.K.E]

Hmmm maybe MAF sensor i will give it a clean, but it's not that dirty.
It wouldn't be the fuel pump

[acarmody]

My car does that stuff too. When I'm doing 100km/h and let go of the accelerator it 'bounces' a bit. Does it at lower speeds but less noticeable, below 80 doesn't even register. I have replaced fuel pump only a couple of months ago so not that, and the MAF only got replaced last year. So got me stumped.