And your question? obd-1 was a cable allow you to interface with your ECM board, to allow you to program and scan thru the defaults, located at front passenger, under dashboard carpet.
ok first of all they dont change every 3 years...that guys on crack....yes your car is obd-1,and all eg's come with a single cam in the u.s.and obd-2 is 96'-present they still have not made a obd-3 yet .