does the air pump have anything to do with the 5th and 6th ports opening

 

it depends on what series your car is

 

and possibly what kind of exhaust you have

 

i have a s4 and it has no air pump and stock exhaust

 

the air pump causes the 5th/6th ports to open on an s5
s4 uses exhaust pressure

 

So on an S5 is it necessary to hook up the airpump to the catalytic converter? I've got my airpump attached to the engine still, but I don't have the airpump connected to my exhaust. Are my 5th and 6th ports still opening up at around 3800 rpms or does that change things?

 

Without an airpump your car will get a flat.