RSS Filter plugin .You have option to customization your WordPress RSS feed items.
Only Sticky Post show in rss feed?
Show Only Sticky Post check box set to checked .if no sticky post found that it work default like
How to Exclude Certain Categories From RSS Feed?
In Exclude Category text box enter category ids (comma separated)
How to Exclude Certain Post From RSS Feed?
In Exclude Post text box enter post ids (comma separated)