The standard intake has the pipe from rocker to intake which I've deleted, the 2 small lines running to what I assume is a sensor or some sort of idle air valve I lengthened and car runs fine but what I don't get is the pipe running on the other side of intake down to outside the engine bay into the small unit and back up and into the back of intake.... what is this for and can I delete it without any issues? I took off the one from intake and it's running fine any help appreciated cheers Phil

 

By "delete" do you mean remove, unless you are one of the Cybermen?

 

You probably want to keep the crank case ventilation ( the one you've already "deleted"), and the other one you're talking about sounds like the Secondary Air Intake pump - you can delete but you need a kit - see the For Sale section; https://www.s2ki.com/forums/uk-irela...e-kit-1129089/

 

Indeed, you'll probably blow all your cover gaskets if you dont..

 

I haven't it blocked off I have it vented out just so the crap doesn't recirculate into the engine,deleted the coolant line to the tb aswell

 

Could it be something to do with purge fuel tank emissions

Have a look on lings Honda for a schematic view of components to verify before removing.

 

just get a vented catch can and run both to that, removing the pcv