It moves just as the car starts, but then drops dead. What are some reasons why?

Thanks.

 

It might sound crazy but is the tach actually connected to the coil?

If you have a regular ignition (Non GM/HEI) Then connect (typically a green wire) it to the negative side of the coil. Otherwise there is a designated tach terminal for GM/HEI distributors or other electronic ignitions (MSD).

Check the wire, see that it's connected and doesnt have any breaks and go from there.

 

Yeah, I think it's all plugged in right. In the distributer, right?? Any other reasons why?

When the car is off, the tach goes to I think about 1k, but drops when it turns on? So, I dunno, I need you smart guys here to help me troubleshoot this!

 

Nevermind, it works. Thanks.