c20xe car cutting out/ going to stall/ poor running

[Vausey]

Its a c20xe in a nova

Right when i am setting off it somtimes doesnt run smooth asif its missing and when you boot it its hesitates and when you slow down with clutch nit to a hault it drops really low or cuts out...

Ive done the breather mod.. and ive got a oilcatch tank running from th big hose on the left to the big hose on the inlet...

do i need to do anything else on the oil catch tank side like block the little...

[Vausey]

also to add its meant to have an lambda sensor but some one taped it up so i didnt know and i came to soon find out what the taped up clip was only problem is i cant find one anywhere... and i was told if i earth the brown/ blue wire it takes away fault code 367 now im getting fault code 44 witch is also oxygen sensor...