Rough idle
 

Hey can someone tell me what I need to do for my Scion FR-S. When it’s idling it will go up in rpms and spike and all I don’t know what to do.

If it's fluctuating a little, check if it doesn't coincides with engaging AC compressor. If a lot, describe in more details those spikes, like how often, by how much rpms .. or eg. film it on phone and post here video of that.

Only fluctuateS in the 1000 rpms and drops I was running ac this morning and it was still doing it.