Not sure if the sound from my engine is actually fine it’s had loud/rattles, since purchase but recently it’s been giving me problems like when I was at a long red light it just started bumping revs up and down to around 2k and to a point where it nearly sounds like it’s stalling so I’m guessing that maybe could be a vacuum leak but I can not find it.

so today I started it up to take a video of the sound this thing makes and about 5seconds later it started smoking white not much though on the extractors for a good 20seconds then I turned it off not sure if it’s fluid smelled a bit like burnt oil but couldn’t see any.

here are the videos:
https://streamable.com/k11n3g
https://streamable.com/fse7to