I am having a weird issue with throttle response and RPM fluctuating.
1) When I am cruising at a steady speed on the hwy I notice my engine speed will jump up and down by a couple hundred RPM. Sounds almost like it is kicking in and out of over drive??

2) When at idle with the A/C on the RPM's do the same as in #1 and I notice that the Voltmeter guage drops up and down as well. I turn the A/C off and it stops.

3) When using the cruise control.. if I barely press the brake pedal to release/disengage the cruise control.. The engine speeds up!! I have to give the pedal a pretty firm push in order to disengage (still has a quick rev prior to disengaging) or just turn it off a the switch.

Any ideas on these? Are they possibly related?

With the a/c thing...my pressure goes up and down a little, and when accelerating it seems likes it takes a little longer to shift. As far as the other things i have no clue... could be many things, possibly maf sensor?

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2000 Firebird 3.8L V6

Pacesetter headers & y-pipe | cacto 3in CAT | slp factory dual exhaust (off a SS) | whisper lid w/ K&N filter | aluminum DS | 1LE 32mm front sway bar | 3.42 w/ lsd