wierd idle?

[silvia_ca18det]

so just finished SR swap and i have done everything other than change the plugs anf fuel filter! when the car idles it idles fine the all of a sudden drops off for a sec then goes bakc up! then a bit after it does it again and goes back up! no vacume leaks no boost leaks MAF's voltage is fine TPS is adjusted to spec! the car runs fine and boosts fine but on idle it has a little struggling! also have adjusted the AAC aswell! any ideas as to what could be causing this?

[sr_powered]

make sure your BOV recirculating hose is connected. the engine tends to idle rough if the hose is not connected.

[teddy]

seafoam it. See if that helps.