Hey what's up y'all, I'm new to the fourms but came on here due to frustration and a misfiring RB26. My 1992 Skyline GTR has a misfire that seems to be random. It does not happen upon could start from what I can tell. Checked the computer codes and they flashed all clear. I pulled the plugs and saw they were covered in black soot, some worse than others but all generally dirty. Replaced them with some iridium plugs from NGK gapped at .8, and that didn't fix it, then put some used but nice Splitfire coils on it, which seemed to maybe help a little but it could be placebo, also seemed to not wanna start with those coils in and low idle. The car is drivable but feels down on power and the misfire is pretty constant throughout the rev range. Only other thing I notice is she spits black smoke and it leaves these carbon specs all over the rear end. Maybe she's running too rich? I'm stumped and don't wanna put any money into it until I know what's wrong. Anyone have an idea? Thanks alot!