2G Top end sputter under heavy acceleration

[LilRedSpyder]

So I swapped my trans a while back and the car started missing bad. Since then I’ve replaced the following: spark plugs, fuel filter, fuel pump, maf & air filter(adapter-cone). Car has a new fuel tank and I’ve jow ran a cpl bottles of injector cleaner and use only 93 octane fuel. Checked all vacuum lines and checked that I’m not losing fire thru my wires anywhere that I can see in total darkness.
It’s only sputtering on the upper end of my gears and under hard acceleration, if I lift off the pedal and ease into it she runs strong. I also bypassed my fuel pressure regulator temporarily to rule it out as the problem and nothing changed. Anyone had this problem or have any idea what could be causing it?? Any help is appreciated.

 

[LilRedSpyder]

Could be a boost leak and the car is leaning out, but you said you can creep on throttle and it’s fine?

Yes, as long as I’m easing into acceleration, I’d say no more than half to 2/3rds down and gradually it does good. Past that point in 2nd thru 5th it starts it’s stupidity.

 

[Evo joe]

It still sounds like a boost leak because if you creep on the gas you can stay low or out of boost!

 

[LilRedSpyder]

It still sounds like a boost leak because if you creep on the gas you can stay low or out of boost!

Hmm...
That being said, I’m gonna go look around to check all of my lines and fittings for anything. I still haven’t gotten the one remaining item to make a tester.

 

[LilRedSpyder]

Could be a boost leak and the car is leaning out

It was a boost leak. Found it today. Top line on intercooler clamp was loose. Thx