Buzzing sound on startup

[over steer]

My '94 eunos emits a buzzing sound when the key is turned to the second stop. This stays on till about 2-4 seconds after start up. Or else stops after 6 secs if I don't start. Also if I kill the engine when warm and re start it doesn't buzz. I always thought it was an oil pres. warning, but then again it didn't buzz when I blew the engine to shreds. Any ideas?

[over steer]

hmmm feeling like a bit of a moron right now... ill check it out