I know this thread is old, but I’m having a similar issue on my 2006 Accord V6. I recently had my power steering pump replaced because it was leaking and I did have my rack guide bolt tightened a tiny bit.
My steering intermittently feely like jelly at cruising speeds. It has no definitive on center feel and feels really springy and overboosted. It will feel wired for a day or two, then feel nice and tight for a week and it just keeps doing that off and on.
I’m planning on having my trusted Honda perform any necessary repairs.
I had him check everything in the suspension about a month ago and the only issue he found was superpefical cracks in the compliance bushings. Car has 150K miles and has lived in Southest Louisiana it’s entire life so no salt related issues.
My question is, should I start by having the guide bolt adjustment put back to spec and have a steering flush performed to “unstick” the valve? Would that even be worth pursuing at this point?
My steering system also makes a slight clunking if I shake the wheel with the engine off. My tech says it’s the lack of the engine pumping fluid through the rack and that slack that the lack of fluid pressure is what I’m hearing when the engine is off.
I’m a bit frustrated as my favorite feature of the Accord is it’s excellent steering feel.
I have videos documenting everything if anyone want’s to see them but I feel my issue us very similar to OP’s issue.
This is the only thread I’ve found online that documents this happening.