1. sounds like a vac. leak or a jammed egr valve ... then again, it could be something like a timing belt, old spark pulgs, old spark wires.

2. ...

3. it's not so much the window coming down, it's if you can get the door panel back in place. some of these newer speakers have such large magnets that they don't fit too well in tight spaces. from personal experience, the mid level Pioneer speakers sold at Wal-Mart are a terrific value. I got 3 way, 6.5's for my Accord almost 4 years ago and I get so many compliments about the sound in my car.

4. no, there's nothing like that around. you could be the 1st, but I wouldn't suggest it.

remember, just because your car doesn't have alot of miles on it doesn't mean parts don't need to be fixed. use this as a must do checklist ...

_ timing belt
_ power steering belt
_ water pump
_ spark plugs with wires
_ radiator fluid flush
_ transmission fluid change
_ brake bleed
_ power steering fluid change