after driving car for an hour or so, started acting like it ran out of gas. except it would idle ok. push pedal and it sounds like its misfiring. limped it home. checked for any loose connections, burnt wires, etc. nothing obvious found. after about 15 min. i restarted car and it ran fine. so, i replaced coil thinking this was the problem. went and drove for awhile, and had same problem. limped home, killed car, and restarted and it ran fine. does anyone have an idea as to what would cause this. im lost and getting aggravated... thanks for any help.