Random stumble under boost, comes & goes...MAF issue?

[Cgeigert]

So car has been running and driving like a champ, has always had a slight misfire at idle. Just today was boosting fine while driving. Then went to hit the gas and started stumbling when it hit boost. Would just stumble anytime I went over like 3000 and didn't boost. Drove it home and checked out all the vacuum lines. They all looked good so drive the car. Was doing the stumbling for a second then started driving fine. Didn't have issues after that. I don't think it's a vacuum leak, does this sound like a MAF issue?

[Cgeigert]

Well it's not the MAF. Swapped it out and still has the same issue. Funny thing is that it comes and goes. Sometimes it drives fine and then in the same trip it will start bogging. Checked all intake and turbo connections, all the vacuum lines and it looks fine. I didn't do the swap but I did redo the MAF extension wiring and I did it properly with solder and heatshrink wrap. What else could it be?

[Cgeigert]

So I was driving it around some more and it's doing it all the time now. Next thing I'm gonna check is plugs and coils. If I give it half throttle it gets a little bit of boost and isn't too bad but if I step on it it just bogs down and looses boost. In neutral when I rev it up it has a misfire so I'm thinking a plug or coil went bad.

[Cgeigert]

Plugs and coils are good. It has NGK Iridium 6 and they were light brown, just a speckling of white, no corrosion. I replaced with standard NGK 6 gapped to about .32 Car runs and boost great when I first drive it cold. After it warms up then it starts misfiring at idle and bogs down when I try to WOT. Can't think of what else it would be but something seems to be affected by the heat.