my car is a 94. 5.0 cobra engine. its been running fine, i just drove from my home to work witch is about a 45 min drive everything went normal. i parked the car here at work. about ten mins or so i went to get in the car to run over to the bank and it won't start. as soon as i turn the key, it turns over once, and if i hold it long enough i will finally turn over once more, it sounds like its having trouble. PLEASE HELP !!

(just return it if you don't want/need it