My plugs are RJ12YC

Good luck with your dirty idle. I agree with Robert on attacking that one.

On Friday, I will be leaning my mains and adding a richer pump nozzle. I am hoping that will being my high-vacuum cruise closer to 14 and help me finish eliminating my lean off-idle. I will check in as soon as make those adjustments.

I also figured out how to get logging working on this A/F gauge so I am going to cruise around with my computer to collect data and then create some charts to show various A/F readings. I know that's kinda geeky but it will help me look at the mixture in far more detail.