94 Eclipse, when I wait at light or stop sign then start up turn to left/right, noise comes from the bottome. There is no noise when drive and turn.
What is the problem?

Thanks!

Possibly from the exhaust? Either the heat shield or the pipe itself is hitting the undercarriage and causing that noise.
You should also inpect motor mounts to ensure there's no damage.
A thorough sub-frame and suspension inspection is likely due...