my VX does this repeatibly. Everyonce n a while I will attempt to start, then it dies...same..etc...attempt to start but keep gas on pedal it will stay started...but take foot off and it will die. Open gas cap and close AFTER you attempt to start and then it dies...and it will usually be ok.
not sure why...have checked all connections to anything that could be a culprit....I've been told to replace the fuel pressure regulator and that should fix it...