I have a simular problem. I am running a A10 box and svs intake. My motor will shut off atomaticly also just like you turn off the key. But, right when it turns off if i play with the throtle back off it and give it alittle it will fire right back up, not even having to turn the key. I belive it is a vacum problem Ive heard that the svs style intakes sometimes have vacum problems. I have been through 5 differnt efi's all of them do something different. But, each one may do something different when there is a vacum problem. I have also changed everything from switch boxes to staters, coils, wire looms, rectivefires, anything that you can think of I have done and changed. Leading back to posiblity of vacum to the efi. Thats my next thing that Iam working on. So dont feel to bad you ant the only one having messed up problems. Your motor might not be the same problem, but I would check everything it might be something small and stupid like a vacum problem. Sorry for not helping more. Good like with the trouble shooting.