Did you recently disconnect and then reconnect the vacuum line at the wiper motor (some motors have two connection tubes (only one tube is correct)?
You say that "air is getting to the motor . . . and is coming out of a small hole". That would be vacuum "getting to" (sucking on) the motor and air might be pushed out a small hole.
Here is
a photo of where to lubricate a wiper motor (the photo comes from an article written by Bob Adler).
Tim
