So it does this all the time? If I left my car sitting overnight, the next morning about 3 mins after cranking it, it would do lean and spit and backfire and miss,etc..... So I would just throw it in neutral and rev the piss out of it, and it ALWAYS cleared right up. Before I learned what to do, it would do it forever until it was revved.

I know it may be a horrible idea to do on a leaned out boosted car, but have you tried to rev it up?

Hope you get it straightened out.

I have reved it but I can only rev to 2000rpms because I make boost in neutral at 2500rpms. It dies richen up when I rev it but still the passenger side does not fire.