I have an 86 rx7 non turbo, When i drive there is a constant buzzing sound. It randomly comes on and off. When i step on the clutch though it never come on. The seems like it is coming from the dashboard. None of my warning lights are on and there doesnt seem to be anything wrong with my car. If you have any ideas please tell me.
Thanks
Brendon

 

I tried putting some oil into the engine and then i started it up and drove around. The car isnt making the noise anymore so i guess it was just the fact that there wasnt enough oil in it.

 

there is an oil and coolant buzzer, if you hear that noise again it's either of those two.

 

Probably low coolant thats wut usually happens