I have a 95 z28 I removed the air pump and sensors as well as the evap sensor...do I need to keep the sensors plugged in even know I'm not using what they control?

 

What sensors? EVAP does not have a sensor, it has a solenoid. What is the reason for removal of these things? Trouble codes will follow for most items.

 

Be everything involved with the evap sys and air pump

 

The EVAP system recycles collected fuel vapor. Keeps the back end of the car from stinking of gasoline. Doesn't hurt performance in any way. Neither does the AIR system.

As Rob indicated, there are no "sensors" associated with either system, so it appears you deleted the systems without knowing the details of what you were doing or why???