4.0 v6 have lean code and IAC valve code it will accelerate but won't gain over around 3 to load speed and won't shift up

What is your question?

It's all the time now but hit all at once replace the TPS sensor fuel pressure regulator mass air flow sensor both upstream oxygen sensors

What makes this problem better or worse?

Nothing

How long has your 1999 Ford Explorer had this problem?

Few weeks