Originally Posted by Infinity

I don't see a code in the list for "random" you should be able to pull the code and it will point you to which bank and cyl has the issue. Once you have those codes i.e. P300 (multiple missfire) + the codes to tell you where to look 301 = cyl1 302, 303, 304, 305, 306 then you can narrow it down.

CPS will give you issues in fits and starts until the car won't start at all (it will crank).

Clogged Cat will start with a mild miss and then eventually work its way to having to nurse the car to a shop as there will be no power, violent shakes, and in some cases stalling.

You may find out that with the extra boost you are blowing out the spark as it tries to jump the gap, or that one of the coil packs have issues.