Just some random string of 4 letters that has no current meaning and is not pronouncable.. probably not.
If it's a 4 letter name that is a common acronym or has high Google results or search queries, then possibly yes, being easily pronounced helps.
Check the .com of the same four letters. If the .com is parked, then the .net is probably worthless at the moment... until you make it valuable somehow, which can be done with any domain name.