In recent days I've heard a number of reports of poor idle when using a FAST manifold. I was suggesting replacing the FAST with a stock manifold to see the impact.

As for the tune, I think you are simply not getting sufficient airflow when cranking and for cold idle. As a quick test, try setting {B1650} to 3600 and {B1651} and {B1652} to about 4%. You may need to lower your settings in {B1829} though, as 41gm/Sec should be nearly 10 times too much.

See what those changes do.

Simon.