I have a 1987 "carbed" CRX.

I have my alternator wired directly to the hot post of the battery.
I have the hot post of the battery connected to the Master Disconnect.
All charging current should be going to the battery or through the Master.
All power for the fuse box and ignition comes off the "On" side of the Master Disconnect.

Both the fuel pump and ignition coil definitely shut off when the Master is switched "Off".
However, the engine still runs for about 3 seconds after all power is off.

Is this due to energy still in the coil?
Or have I missed something else?

Thanks,

Todd