Some Payday Loans will approve you for a payday loan when you have bad credit especially if you go for a title payday loan.
You take your clean title to your vehicle and then the payday loan company holds your title and puts a lien on your vehicle and then they approve you for a title loan.
Then you pay back the payday title loan and then get your title back.
You can also improve your credit score using a secured credit card where you put up a deposit and then that deposit becomes your credit limit.
Then as long as you use the secured credit card properly and make the payments on time then your credit score will increase to where you'll be able to get a regular credit card and traditional loans.
I've gotten payday loans before with bad credit and usually had no problems doing so.
You could also look into cashinasnap.com to get a payday loan with bad credit as I've had good luck getting payday loans through them an many other payday loans.