I just started to have this similar problem last night but in my case, the car shuts off when i stop or even when i put the car in neutral(it kinda just boggs out and studders) starts up fine after that. ignition switch seems fine. its a d16y8 turbo. But when i drive it seems like i lost power like it really weak. im only boostin 6lbs daily. i dont have any vacuum leaks, plus the weird thing is, i always use shell 93 oct. then i just recently put bp 93oct on sunday and then this started to happen. Please help it sucks starting up my car everytime i stop!
p.s. - when i come up to a stop in neutral and rev the car to keep up the rpms a bit, then it doesnt stall. only when i put it in neutral comin to a stop the rpms just drop