I was searching the forums yesterday and I recall coming across some post where someone said "yeah mine idles like a train because of" and I can't recall what they said...I feel like it was something "valve hose" ? Thought I'd ask. Haven't found anything so far and it seems every shop in Seattle is working in overtime and is busy for weeks. Thankfully I found one that will take a look on Friday. Wish I was still living in a house, apartments and car repair is trash 😒