what to do with EGR connector?
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1) if you ever have the need to put the EGR/Air back on (for Smog test, selling the car, etc.), you need to leave the connectors there, just tape or zip tie them and Tune the codes out (which you have done).
2) if there is no plans to ever restore the EGR / Air, Tune the codes out and you can cut and remove the connector and also if you want, remove the wires all the way to the PCM to clean up the harness.
But leaving them would hurt anything.






