Can I return a car withing 72 hours of purchase?

Question Details:

This car is in a major recall because its dangerous. I signed papers titles, etc. yet no money has been exchanged, and the papers I did sign were for a different financial institution, payments, term, etc. Upon signing the dealer told me that he can't get these payments, that I can walk away no questions asked. Now that I found out about the recall, I don't want the car and he said that since he found a bank that will give me lower payments, term, etc. that I have to take the car because I signed the papers. I told him no I want my car back and I'll give them theirs. Can they do this? Do I have some kind of 3-day right to rescind the transaction? Important Notice