after my car is good and warmed up my it idles around 5-600rpm and then I'll hear a "click" and it'll move up to about 700rpm or so and will keep on doin this when I'm at a light...what could it b?..will it cause any problems if I dont get it looked at??

 

you've got your AC on, thats the compressor clutch kicking on and off

 

even w/ it off it will idle low...is it maybe b/c of my mods?

 

or the defroster

 

Fans.

 

fans?...maybe the alt. has such a load it pulls the idle down

 

its your electric fan kicking on. the load caused by the fan causes the car to idle up

 

how would I kno if the electric fan kicks on ??...

 

you can just hear it...it does it on mine as well...its not a big deal...it does it when your fan kicks on...your AC clutch...when you hold down both the buttons for the windows after they have rolled up or down...as i said...nothing to worry about