another question

While I'm asking questions....
I drive a 98, 150k miles. When I stop at a traffic light or something it makes this vibrating noise under the hood. It begins after I've been still for a few seconds. If I put it in neutral or park the noise stops. Should I worry about this? It was just tuned up about 2 months ago.

I'm not too familiar with that engine, but I had the same thing happen to my saturn. It was a crushed upper motor mount. It wasn't more than 40 bucks. Replacing it was pretty easy, you just jack up the engine take off the old one and put on the new one, get some torqing specs if you DIY. if that's not the problem, Then check the bump stops on the hood. they're adjustable, sometimes a hood will rattle if it's not snug against the bumpstop.