u/InteractionNo4707

Any help is appreciated.....

No codes, car seems to run fine, maybe a slightly rough idle, not notice able in N mode.

LTFT settles around 17% at idle, with 0% to -3% on short term immediately after reving and letting return to idle. Reving or driving LTFT and STFT are both at 0% this points to a vacuum leak. O2 Lamda is around .998 to 1

Does not seem to change with warm/cold engine.

However, running a smoke machine through the intake I can't find a leak.

Things I've changed on the car. K&N AF, stock box. Replaced HPFP with N75 pump, no change.

I can't remember if I am running HR8 or HR9 plugs. No tune or other modifications.