I have the following mods on my 98GST: u/i piping with 1st gen BOV, K&N air filter,MBC at 15psi,2.5 downpipe, no cat, 3in ATR exhaust, free mods, air-fuel and boost guages, big 16g, Walbro fuel pump. It seems my car is giving a huge jurk back when i hit around 6000rpm and then again in 3rd. I just got the big 16 and fuel pump, but before upgrading i never had this problem. Is this fuel cut or could it be something else? I have nothing to control the fuel nor do i have bigger injectors or S-AFC etc. Please someone let me know if this is fuel cut so that i can stop worring that it could be something else. If this is fuel cut what can i do to eliminate it.