I was just trying to clean up the engine bay and I capped off the vacuum port that goes to the CCP solenoid. The car started running really lean at idle. I disabled the error code, what else would I need to do in the tune to prevent this?

It went from Idling at 14:1 to 17-18:1. I hook the line back up and the afr goes back to where it's supposed to. Very strange.
Any ideas?