I just finished doing an h22 swap with a light weight (~9.68lb) flywheel, so I don't know how the engine is suppose to act with the lightweight flywheel. Anyhow, when I am warming up after a minute or two I can hear the engine start to oscillate a tiny tiny bit. I can't see it on the tach, but I can hear it if I listen. After the car is warmed up I get a little bit more of a funny idle, but its nothing crazy. Maybe 50 - 100rpm variance at most and shows up on the tach as a slow and tiny twitch.

The worst part is when I am braking my engine will idle at 1.5k or so if I am not in gear. It will remain that high until I stop and then drop down to 500, almost stall and then go back up to regular idle and continue the regular 50 - 100 rpm oscilliation.

I checked the IACV and it looked to be in good condition, but I cleaned out the screen a little bit. I also did a vacuum leak test and couldn't find anything crazy. I used carb cleaner and I was told it suppose to increase RPM. Well I couldn't easily tell if it increase outside of my normal oscillation. If I did have a vacuum leak the sucked up some carb cleaner would I really notice it?

I checked all the vacuum lines and everything seems normal. They are all definetely connected and should be in the correct places because I used the Helms manual to line them up. I double checked them too so it should be properly done.

Another suggestion tossed at me was the alternator. I have spilled some power steering fluid inside the of the alternator during the swap. I forgot to pick up electrical cleaner, but I'll give that a shot too.

Anyone else have any suggestions or ideas? Could this just be normal for a lightweight flywheel?

(I searched quite a bit and correlated with stuff in my helms manual, but I am running out of ideas and components that I know to look for)