lawl ..... well he didnt have them "deleted" ..... he probably just removed them and the ecu im sure is throwing a CEL and wants the data...... the ecu NEEDS O2's to make correct adjustments with A/F etc , as far as the evap system ? no telling what he has done im sure its just everything unhooked/removed , the chipped p28 has NOTHING TO DO WITH THE SITUATION , 1996+ has to have a ecu with no cel codes and a catalytic converter to pass emissions, can become quite costly to make it pass if somebodys done a bunch of shit