yeah I'm aware of this it was correctly reinstalled .valves have been adjusted it sounded like a ball bearing was bouncing around in my valve cover @ #3-4 cylinders (near distributor) . I've sent it back to rockuto it takes a couple of weeks for them to process returns FYI but they are really cheap on prices . I'm going with a Spectra distributor next . I guess my main question remains what does the #1 cylinder sensor do . When it throws a code does it cause any effect to the timing/vtec /cause a limp mode ect. It runs pretty good with the current dizzy throwing the #1 cyl code.Don't know but once came across a distributor somebody put in wrong, that slot in the distributor is off set so it goes in in one way only unless your force it. Also the valve train on the b series engines need the valve lash adjusted now and then, it can get a bit noisy.