I just did a intake valve clean treatment from Seafoam. The spray. My car idles WAYY SMOOTHER after. Like how it should. Dealer kept saying the slight miss was normal. But i bet anything a intake valve was nasty.
It helps alot. I would totally say to do it. But don't lose the 2 plastic things on the side of the intake horn clip.
I lost both of mine 😞
Ill have to order new ones.
Luckily i took a pic when i lost ONE and lost both trying to ask a Tech if i could buy them. And pic has part number.
I don't think they are critical but it keeps pin centered that holds the horn on.
Anyway.. Yes!!! Do the intake cleaning every 20k. I KNOW the engine will sound better. I ran mine for 15 mins at idle and noticed BIG TIME how much smoother ot purred.