are veilside catback, apexi induction kit, twin blowoff valve and some aftermarket ht leads. This only happens when hot when cold there is no osund of misfire during transition. Even when hot after the strange transition boost is fine up to redline which is why I think it's a solenoid. Not a boost spike, boost is at a perfect. I have check vacumm lines at rats nest all are ok. Map sensor pipe is ok.