Ok, I've read, read and read some more. I've searched, but no luck.

When I do a cold start, it searches bad for 45-60 seconds then settles in. The problem is, that it searches so bad, that it stalls most of the time if it's too cold.

I don't think it's a RAF fueling issue, because at the beggining of the cell, it's adding some fuel, but by then end of the cell it's pulling. Also, it's still in the same cell when it stops fluxuating.

Here's tune and data.

 

I had to tamp down the afterstart enrichment, after the cam
swap. Also worked a little with the friction airflow adder & decay
to keep it happy short-term, but fat fueling always makes for a
less stable idle.

 

But it's weird that it only does it for 40-60 seconds on initial cold startup.

 

I also had to work on the startup friction airflow/decay and I also increased cold start idle rpm to a little over 1k rpms.