Good day,
seeing if anyone has experienced this before and has an idea..

my 2013 G37 would have a very light sputter, kinda like a loss of breath randomly. This happens in any gear and including park or neutral. Previously I changed a coil pack because a code read misfire. The misfire was fixed and am unsure if the misfire was caused from the sputter which was happening before the coil needed changing. Current codes on the vehicle reads loop issues. I am a huge rookie at all this and hope I can get some insight.