Sea-foam isnt gonna do anything for him, unless there is a problem with ivac or something similar in the intake track. Simply unplugging the ecu before you go to the emission place isnt going to do anything eithier, because he wont pass readiness.There is obviously wrong with the car because your passing readiness.A car has to pass of its readiness test for it to pass emissions. Go get a diagonstics test done (i would get it done at a repair shop because thier scan-tools can ussaly tell more then a parts store) see y the car hasnt passed readiness then go from there. i doubt its the ecu but you never know.