It takes Veronica a little effort to get the Coronet running, but it sounds horrible.  She waits to see if it will clear up, and when she tries to rev it, it dies.  Towards the end of the 1st clip, someone has to change out the dead batter, and she keeps trying.  In clip 2, the Coronet is being VERY temperamental, and Veronica starts to get upset with it.