this seems odd

i don't know if anyone else has had this happen to them, but when i turn on my a/c my car revs itself, when i turn it off the car is fine, anyone know whats up with that?

A small jump in RPM's is ok. The AC puts an excess load on the engine and it compensates by jumping up a few hundred RPM's.

how high does it jump?

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1992 Camaro RS LO3/700R4
Brand New 3" Exhaust I-Pipe For Sale
Brand New ZZ4 Roller Cam For Sale

mine does the same. it will rise/fall repeatedly about 250 rpm or so. that seems like it would be pretty normal.

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91 305 drop top
Holley air cleaner
Flowmaster 80 Series
Bosch Platinum 4+ plugs
160* thermo
Cragar S/S wheels-just so I could negate any speed I may have gained :)
more coming soon

it only jumps a little but the car feels like its gonna lurch forward when i'm stopped at a light or a stop sign, it feels like the beginning of a brake torque but it doesn't have enough rpms to spin em. i just don't want the car to lurch forward on me while i'm stopped, i just had the brakes done to so that shouldn't be the prob