neat article I found while looking up some stuff about cop's

http://www.asashop.org/autoinc/feb2003/mech.htm

explains a lot about how our stuff works....

 

i used to make the COP springs with the ferrite cores for ford at my old job. they complete the circuit between the coil and the plug. i always wondered how long they lasted or if they ever needed to be replaced. anyone ever have to service or replace them?