Knock sensor has nothing to do with what happened to your car.

You have physically damaged something somewhere.

 

So! After a little bit of researching and finally having time to work on the car, the noise is coming from my front splitter. Turns out the body shop that installed my front splitter used screws into the bumper rather than chassis mount, and with higher wind pressure it was forcing the screws down and smacking the screws against my bumper making that noise
As for the code, decently certain it’s the knock sensor actually going bad seeing as how it didn’t pop up until messing with the secondary air injection hose (harness for knock sensor is right there, possible I could’ve pulled it)
Now what’s interesting is that I was driving the s tonight for a little while since she hasn’t been out, and about ~30 minutes into the drive she started…bogging? But only above 3500 rpm or so. It would still go past the revs but very hesitantly, and very stuttery. Would that be retarded timing due to the bad knock sensor or limp mode kicking in, been searching online and the forums for an answer but nothing yet. CEL is still the same code as before. And during the drive, I refused to touch vtec even once, since she has to make a 100 mile drive before the new knock sensor arrives

 

I've heard of pre 2006 cars having pretty bad bogging issues with a broken knock sensor.

Don't know if this applies in your case, but it could. Regardless, you have an issue with the knock sensor that you need to fix, so I'd do that first and then worry about the bogging next.

 

Well guys…it’s back, after about a week it popped back up again, and I’m noticing something, around 4.5k rpm during the day only it feels like I’m detonating slightly, so my first thought is injectors. I ran new NGK spark plugs when I first swapped the motor so it leads me to believe that it’s either injectors or coils, after that it’s either sub harness, ecu, or the motor itself. What’s weird is that during the night it drives just perfectly, revs, pulls strong, it’s like the CEL is negligible but I feel it during the day. Ideas, thoughts?

 

Is the replacement oem knock sensor you used the specific S2000 part, or just similar oem part but for a different model Honda?

Where did you source the new NGK plugs? Is it possible they are knock offs? (pun intended)

 

Have you run an OBDII scanning tool?

Thanks!

 

NGK plugs from NGK themselves and oem sensor is from Honda themselves (ordered via dealership). Code from car reads P0325-Bank 1 circuit 1 malfunction

 

Do the wiring and connections seem okay?

 

Certain dealership ordered correct part, not simply a knock sensor for a different Honda engine? They all look the same, fit the same. Don't work the same.

 

30530-pcx-003 should be the right one.