tach hook up questions
 

ok ive been playing around with my tach latly and the terminal i hooked it up to on my msd box is off, it has to be, i set the shift light to blink at 5200 rpms, so it would go off as soon as vtec hit, well, i hit vtec at 4800 rpms on the autometer one, is there a better spot to hook it up at? could there be some kind of interference with the green wire running from my tach to the msd box? anyone?