i have a 90 gt and it had a smog pump. I just took it off and pluged all the lines that ran to it. theres a steal hose that runs from the back of my heads to it and a line to the H pipe. i Bought that plugs for the heads on ebay. there made by trickflow. And the other line to the H pipe was welded off on my o/r one so i had nothing to worry about. when i Put my o/r h pipe on i never put these mil eliminators on and i dont have a check engine light or ne thing is it fine to not have em if that light isnt going on?

 

if the light isnt on then someone prolly already installed them on the wireing harness. just look at your wires near your O2 sensor and see if there is anything spliced into them between the sensor and first plug connection.