When financing a car, do I need to buy the car first or get the loan first?

I’ve got an old ‘94 Mazda Miata that I drive in the summer months and when I took it out of the garage today, the check engine light turned on. I want to have it diagnosed but I can’t find where to plug in the code reader.

I was asked this question on a test. I got it wrong, but I still don’t know the right answer. What force causes your vehicle to accelerate when driving downhill?

How can I dry my car floor’s carpet? I spilled a huge bucket of water on my car floors and now they're soaking wet.