need a lil help trouble shootin

[jmac85]

i am a proud owner of an r32 gts-t. it has an RB20DET. my car started doin this thing every once in awhile where it would start acting like it has no power at all. when taking off once i hit 4500 rpms it feels like it has no power left in it, and other times it has no power takin off and it all kicks in around 3000-4000 rpms. i am not sure if its my turbo goin out or if is my wastegate messin up, or maybe it could be some other unheard thing. i appreciate any and all the help i get, i need to get it fixed cuz it is my daily driver and my toys as well. let me know if there r any other questions.

[jmac85]

i forgot to mention that it runs fine if it has been sittin for awhile and it only does it after i hav got it warmed up and it will stop doin it after i let it sit for a while.

[tyndago]

Swap MAF's.

[jmac85]

i tried that. it still does it. i did notice that i am not reachin full boost.

[themadscientist]

Check your fuel pressure. I had a GTS4 that was doing that and the pump was failing and couldn't meet demand when the boost kicked in; it would fall flat on its face.

[jmac85]

the car has a pump out of a gtr that just got put in b4 i bought the car. but thanks any ways. i was talkin to someone else and i am thinkin it might be a spark related problem.

[tyndago]

It could be a coil or plug. However you should notice a misfire.