Well... My 90 DX is obd1 then... I guess? I thought it was non obd. I know for a fact that there ARE non obd honda's, like in the 70-80 models.... Im prety sure some of those are non obd..... Some one in my auto shop has a 73 civic! It runs great to! Its actualy pretty zippy for the fact that its a carberated 4 banger!