You can't just arbitrarily assign values to the injector constant. You need to know what flow rate your injectors are, and put the correct constant in. After that you DO NOT change that constant. The...

Afterstart enrichment...
Closed Loop Idle...
O2 Sensors coming up to temp...

It may not be the idle settings at all.

Start with disabling closed loop idle, and work on your tuning from there....