I'm working on an RPM pick-up project. I got the MSD 8918 GMR pickup unit and I'm supposed to attach it to the Inductive ignition coil primary wire. Well, i did and it didn't work. It worked when i attached it to one of the spark plug cable wires, but the signal wasn't good enough.
I actually tried it on all ignition coil wires, but with no luck.
Now i don't know if this thing just doesn't work or if i didn't attach it to the right wire.

So here is my question:

Where exactly is this primary wire? Maybe i lost my mind and had the wrong wires this whole time.

Car is a 94 Civic HB with a 97 JDM ITR motor. OEM ignition.


Please reply if you know

 

Uhm, when I hooked up my tach on my 97 Civic HB, the BLUE ignition coil wire was Negative...
...If that helps any =/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MeatballHB &raquo;</TD></TR><TR><TD CLASS="quote">Uhm, when I hooked up my tach on my 97 Civic HB, the BLUE ignition coil wire was Negative...
...If that helps any =/</TD></TR></TABLE>

That was the first wire i tried... Didn't work...
I'm confused now.

Thanks anyway

 

Are you trying to wire a tach?