S.Bill, I really have to appologise,, after posting what I did about detonation and preignition in your engine without an EGR valve.. I was wrong,, I realized this, the next day at work, doing my duties as shop Forman at a Honda dealership as I have been for the past 24 years..The EGR circuit on your car,, being disabled,, will NOT creat any problems, that i Know of,, unless its 1996 or later, then the CEL light will come on.. I realised my mistake the next day,, the earlier Hondas,1989 and before will exibit detonation problems with out EGR working.. My appologies..Suggestion?? Ignore Kai's Post about Mazdas or any other cars EGR useage.. Kia might be a smart guy, but he out of his league here.. EGR is never actuated at Idle,, by no manufacture, EGR reduces NOX/ Nitrates of Oxygen that are created at cruise and slight accel, in your combustion chamber..Egr is disabled at Idle and full throttle ..