Monitor system performance with the analog gauge or perform an air leak test with the same tool!
You do not need to remove the Ipr valve to perform a system air leak test! No adapters needed to screw in place of the Ipr! No fancy diagnostic scan tools needed!
For an air leak test, simply supply shop air pressure directly to the head through an available plugged port, and connect 12v to the Ipr valve.
Tool comes with directions as well.