Can you put in your signature what year car, the make, and any MODS done.
If it is an 86-87 TR, the things to check would be the MAF, IAC, and the chip.
It is a 1987 turbo regal limited with a kenne bell catback stainless exhaust, level 10 shift kit, maf translator and the ls1 maf sensor. I also have a 1987 grand national with t-tops and the same mods except for the exhaust.
Is it showing rich or lean @ initial WOT? I would have to say based on limited information is sounds like a fueling issue. Are the injectors matched with the chip?