ixSLACKERxi

Hey guys,

I've recently changed a few sensors in my car, first was the 02, then it told me I needed to replace the Engine Coolant sensor which helped my car tremendously, then it told me the engine knock sensor so I replaced that. I was told that if I replaced my knock sensor that may fix my car thinking theirs a cylinder misfire because my car does run nice, my RPM's don't dip and I don't notice anything irregular. I went to autozone today to bring back my old caliper and while I was there I had him scan my car's computer and they said still telling me Engine Knock sensor even though it's brand new and cylinder 2 and 3 misfire, the guy told me that it can be anything as not serious as replacing spark plugs up to being a serious problem with my cylinders. I plan on having a mechanic take a diagnostic on it and hopefully he figures out the problem but I'm light on money so I was hoping someone could give me an idea on a few things that can easily and cheaply replace that may fix it? spark plugs? coils?

2004 Acura RSX Type-S
I replace my 02 Sensor last summer,
and I replaced my engine coolant sensor and my knock sensor probably 3 months ago