I've seen a number of reports lately from people who have good rankings for their old, established content, but can't seem to get good rankings for new content on the same site. I seem to have this difficulty as well lately. It's hard to pin down exactly, it just feels like new content isn't ranking nearly as well as it used to.
A number of possible explanations for this have been suggested, for example that there are time-dependent factors involved in the way links pass juice.
I have another possible explanation and I'd like to see what you think of it.
What if my site is set up in such a way that it triggers a filter (or several filters), but my old well-established pages got "grandfathered in" with their old rankings?
My older main category pages have ranked very well for their primary keywords for several years. These rankings have been very steady throughout the numerous updates and shake-downs that have happened during that time. It used to be that when I added new subcategories, they would fairly quickly rank reasonably well for their main terms. Now they seem to get stuck around page 3-4 for any term that has decent traffic, though they'll still rank well for low-traffic long-tail queries.
I've been going through and cleaning up the site, looking for potential problems that might draw filters, and I have to admit, there are a few possibilities. For example, I did an outlink audit and discovered a number of links to expired domains, 404s, and sites that I could swear were good when I linked to them but have since become pretty spammy (or maybe my standards have just changed). I had some affiliate links that were not nofollowed. My nav links repeat my main "widgets" keyword way too much (that worked great back in 2004, now it's known to be a bad idea). There is a vast network of parasite-hosted spam that links to me (and every other major site in my niche, it scrapes the SERPS and links to everyone who ranks). That sort of thing.
I never really worried about this sort of stuff before, because things seemed to be going well. My rankings were good, and I figured, if it ain't broke...
Now I'm not so sure it ain't broke. I'm going to undertake a thorough clean-up to the best of my ability and knowledge, and see what happens.
Do you think this might be what's going on? For those who have similar difficulties, do you think you might be in the same position?
Also, after the cleanup, should I file a reconsideration request? Seems odd to do so, when my rankings and traffic have been steady for years, but it might actually make sense if this is indeed what's happening.