Hey guys, been trying to find this issue on here and can’t seem to find one that matches mine. So here’s what’s going on. I have a 2011 GSR, fbo, 18k turbo, tuned on 91. The car will idle perfectly normal and drive normal some days, then other days the idle will be very erratic and stall out when I put it in neutral. I’ve replaced the o2 sensor, spark plugs, fuel pump relay, checked all hoses and clamps. Can’t seem to pinpoint the issue. No CEL. Any idea of what may be causing this? Possibly tune related? I’m in stock fuel injectors and pump as well no e85. It is driving me nuts. Car will drive fine even when the idle is all out of whack however you can feel the power change when driving like the vacuum/boost level will change about 3-4 psi while cruising. Any help would be appreciated.