03 bmw 330xi hesitates on take off

im working on a bmw for a customer, originally came in for no start and smokes badly, searched around here and other places and found the ccv system at fault, so removed the intake replaced the ccv system and hoses (except hose to dipstick from bottom of valve)

also replaced spark plugs and valve cover gasket

now car has a hesitation when you take off from a stop, driving down the road car drives great, but when leaving a stop it hesitates for a second then takes off, sometimes it will even hesitate enough to kill the engine

first thing was checked fuel pressure, has constant 35 psi at all times

could a vacuum line have gotten switched around or swapped and cause that or am i looking for something else?

well nevermind, found a connector not plugged into that "wirebox" that box with the wires and hoses coming off of it under the intake

plugged that in and drives just fine now