Greetings SAU
My r33 has come up with this annoying idle issue. From a cold start it tends to do it once I give it a slight rev or if it's been running for a minute or so. It sometimes goes away (easy to tell when it's got the sluggish idle compared to how it's suppose to sound)
It also changes the way it takes off it feels as if it's struggling to move, I haven't tried to hit boost while it does this, It also seems to happen when it's warm too (but less frequent and goes away when revs get above 2.5-3000).
However, when I was driving it the other day would of been hot as it had been running for a while, I hit boost in it then it just randomly stalled while I was driving. I tried to start it again it would start fine but then the revs would drop and it would stall pretty much 2 seconds in. I had to pull over because it pretty much would just keep stalling. If I was to rev it to stop it from stalling it wouldn't like it (kind of sounded like extra air was coming out the exhaust or something similiar) I sat there with it off for about 20 minutes to turn it back on to the same issue I was able to drive it home but it struggled.
I hope this makes sense I don't really know how to explain it that well