courtesy of guni and evltwn, we all concluded it maybe the starter motor... this is because of your previous post stating its clicking sounds, but yes as xoom said go to a battery place and ask them to check out with a voltmeter (this should be free btw). with addition to this, if the reading fluctuates alot (ie from 8 to 14 volts back and forth), your alternators past its due date GL mate