Having a fuel setting of 9 actually does exactly the opposite, it heats things up!
A fuel setting of 9 means you will be running a leaner AFR which in turn means your EGTs (Exhaust Gas Temperature) are going to be higher.
When you are running pump sw (stage 2+) it gives you the ability to run a slightly richer AFR because the upgraded fuel pump can run at a higher rail pressure up to 130.