@Daniel Lehman
First I think you need to get rid of that loan at all cost (ie. refi, payoff, sell). That might depend on how much is still left on the loan and how much it is worth. If its only worth $5k it probably is not worth trying to sell and buy another car, though if it is worth ~$20k it might be better to sell and buy a cheaper car. You might not have been able to refi because you might owe way more than it is worth because of the high interest rate.
Assuming a 6 year loan at 24% you would have taken out a $11,000 loan. After 2 years you would still owe ~$8,800 on this loan.
Assuming a 5 year loan at 24% you would have taken out a $10,000 loan. After 1 year you would still owe ~$8,800 on this loan.
From this I'm assuming it is not a $20k car and it is probably worth closer to the $5k mark. If you were to sell the current car for $5k you would still owe the bank $3,800 plus the $3k you spend to buy a cheaper car and you are in $6,800 and now you have a cheaper(possibly less reliable) car. If you just pay off the loan you will be in $8,800 and have the same car you previously wanted(1-2 years ago) you would better know the reliability of the car and the recent maintenance of the car and you spent nearly the same amount.
Just some food for thought. Best of luck in your decision making and your investing.