Can I switch from a 235/65-17 tire and rim to a 215/70-15 tire and rim?

My 02 ford windstar lx had an engine blow so I had to get another vehicle. I bought an 04 Chrysler pacifica that needs tires. The Chrysler has 17 inch rims, and the van 15 inch. I want to switch the van tires and rims to the Chrysler because I can't afford new tires. Is this okay to do?

First time car buyer: need advice?

I would like to buy a car with the following conditions: safe, good gas mileage, easy for me to move seats down in case I move (I don't own much but two furniture pieces I have to put seats down), certified preowned. My family runs within the Toyota, ford and Chevy business but I'm willing to look beyond those as long as the cars aren t notorious for being a lemon. And how much would be good to put down?

Rpm gauge not working normally?

I have a 2004 Ford Freestyle and I noticed today my RPM gauge has been acting funny. When I turn the car on, rather sitting just above 0 it is sitting at one. When I start to accelerate it would normally go up to a 2 but instead it is going to almost 3. It is an older car with 150k miles on it. I'm not car savy in any way but I want to know what could possibly cause this and if it will be an expensive fix or not.

Why doe my car start, sturtter, then die?

I have a 2006 Ford freestyle, sometimes when I start it, it will stutter and die. When this happens all I have to do is give it some gas and it will start just fine. Is this a problem with the fuel pump? Or something else?