S13 SR20DET Bucks at high rpm

[wild streak]

Heres the problem first time driving it today after doin the swap and when I give it plenty of throttle and the turbo goes to kick in at around 4 to 5 thousand rpm the car just start poping and bucking until i let off it alittle, I can catch speed as long as i don't go past around 25% throttle. I have checked intercooler and piping for leaks, i checked the MAF and its wired and working, Me and my friend sat messing with it for hours and haven't made and progress we need help bad. If it helps my 240 is a s13 1992 model i dont think its the fuel pump. some body on another forum told me it would be alright to use stock fuel pump.

[funigui]

check tps and mafs. also check for leaks again

[Asmar]

check tps and mafs. also check for leaks again

Check for leaks first. That most likely is the problem.

[wild streak]

I have throughly checked for leaks, could it be the fuel pump cause the stock fuel pump im using has 230,000 miles on it.