I believe the label is on the inside of the hood, or maybe the door jamb. the haynes says the same thing about timing and I didn't even have a label. best bet is helm. but for the record I have a 88 crx with b16 that idles at like 700 ral smooth and when I pull the iacv plug to make it go to 500 it is still smooth, so you may need an adjustment on a thing or 3.