I have been trying to do logs for my tuner at 2k rpms in 3rd gear and when I go WOT at 2k rpms it misfires/stutters until about 3000-3500k RPMS and then comes back to life. Sometimes, it will also stutter/mis in the same pull at 6k to 7k rpms. If I ease into the pull at 2k rpms it will not mis/stutter. Injectors were just replaced. Got a code for cylinder 5 misfire and both o2’s yet I just replaced both o2’s with Bosch OEM 17098. Runs great but when I mash the gas at low rpms it has its hiccups. Possible vac leak? Not sure I need some help. Car is single turbo with a Garrett gtw3884r.