ok i had a 5 pin dist. it took a crap before it did the tach worked.. puta 4 pin in. didnt hook up msd. tach still worked i hooked up the msd today and now the tach dont work...it still lights up but i cant figure out where to plug it into...tried off hte cap and off of the "white jumper" with no go. anybody know where its sposed to hook up? or did my tach die?