Here is the deal, I just installed my apexi kit on my d16y5. I put it in, and it ran great for about a day. Then all of a sudden it idels like crap and I figured it was a vacume leak. I am at -15 vac. What should I be at? Also, sometimes it will idel, but when I rev it and let off the gas and it will almost die. I need help. Thanks. Also, might it add, when its not ideling, it runs great. Any idea on what to do. For my afc setting(running the afc hack) I have -40 across the board untill about 4000 rpms then it trickles up t0 -35.