On Mon, Mar 7, 2011 at 8:19 PM, Andre Abelian wro= te: > sorry I didn't give detail info. it's 4 cylinder engine standard old 40 y= ears > old =A0vw bug car. > I have been told measuring from sensor side I should get 133hz @ 8000 rpm > but the way I see it 8000rpm/60 thats 133hz for each cylinder that means = I need > to > x 4 to get sensor side value am I right? > Yes you are right. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .