yesterday it started going off at like 5-5.5k rpms
i dont know what this would mean cause thats really early for it to be goin off ne idea on this cause i have no clue why it would happen

 

Maybe it is the low coolant or low oil buzzer. Check the levels.

 

Again i second you Santiago, check your coolant levels and oil ...

Acctually you should take the time at every gas fill up and check all fluids... i know it sounds redundant, but you never know... would you rather pay 5 bucks for some oil/coolant... or 1500 on a new engine.

-Markus

"Out of three FC's i've owned i've never had a warning buzzer malfunction/short out... oviously your low on something"

 

Of course, be very careful checking your coolant level when the car is hot.

If that's not it, then it is entirely possible that something (a resistor or capacitor....I don't have the schematic handy) in the cluster has changed value, causing the buzzer to sound too early. Is it consistant?

 

i was wondering, but u know the radiator coolant tank in the front. Does the radiator drain the coolant quickly? and do i always have to fill it up.

Maybe i have a leak?

 

ummm, leak probably.

 

Cars do not "use" coolant. If you have to fill it up, you have a leak. Check out http://www.aaroncake.net/rx-7/coolentbuzz.htm and http://www.aaroncake.net/rx-7/cooling.htm