So i called apexi wired everything up the way the diagram says and the checked engine light is coming on cause it to go into limp mode. They have no clue whats going on sometimes it's shutting off . Rhe car actaully shut off all together once help plz.

 

Did you configure it EXACTLY like the manual says? If not, reset your ECU and do it right. I used to have one on my EP and it would do that if I didn't config to the book. It would randomly do it sometimes, even when I configured it (about once every other week). The VAFCII is useless for the k series.

Told you you should have sold it before install...