my grand marquis is digital and it dose not have a tach gage and i got one ffrom a friend i want to put it in but i dont know where to start i got the ground and light hook up i just dont have it showing my rpms and my car has a coil pack on each spark plug and it was looking it up on the internet and all they have is cars with ignition coils and of course that dosent help me but i hook it up to my first coil and i got a little reading about 300 rmps but when i hit the gas it goes away?? so what do i hook my tach wire to if i have induvidual coils in a 2000 grand marquis 4.6 v8 ???
Jun 7, 2012 at 9:36 PM
