Plugs are light to dark tan. The car has been tuned to run richer than normal via an AFPR, since I have modified intake/heads and stock injectors. I clean it so often because I clean the throttle body fairly often.....it gets light buildup from the PCV return that I like to clean out. I usually do the IAB because it's right there, and it's not like it's going to hurt it by cleaning it.
O2 sensors are maybe 8 months old. Coolant temp sensor, maybe 10 months to 1 yr old. Intake temp sensor, where's it located? Throttle position sensor is around a year old, and the EGR valve is maybe 3 months old. Basically, every sensor I'm aware of, I have replaced. The PCV valve is around a year old also, and the screen was replaced because the old one...well, there WASNT a screen in it at all before.
The I had the upper intake off earlier today....the upper and lower look to be very clean inside. Only a few runners on the lower intake had discoloration (black-ish).
As far as ignition goes: Fairly new spark plugs, MSD 8.8 Superconductor wires, MSD cap and rotor that are 8-10 months old, and the distributor gear and pickup coil were both replaced. The coil is an MSD Blaster TFI.
And the stall problem, it's not cold start. It only happens because the idle hangs and if I need to get it into gear fast, dropping it into drive from like 1300 rpms will stall the car.