D22 intake

[nedlerlive]

Hi all, currently doing a head on my2006 d22 navara and discovered this on the intake. Unsure if the side with the actuator on it is even getting air through, doesn’t appear to be as it’s clean and the non actuated side of the intake is dirty as to be expected. Any help on this would be muchly appreciated, thanks

 

[tweak'e]

the swirl valve operates the clean side. if you have the egr blocked off then disable the swirl valve. it should be open by default unless its stuck closed for some reason which would make it slow. the swirl valve only closes at very low rpm.
the reason one side is so dirty is that dirty side has the egr on it and i suspect it blows soot back up the intake at times.