Crazy starting problem ???

I have a 1994 Nissan 4X4 pick up automatic with the 3.0 motor, the problem is when I go to start my truck, I turn the key, hear a click and I hold the key in the start position and in about 2 to 4 seconds the truck will crank and start. The 2 to 4 seconds I'm holding the key nothing happens and then all of a sudden she'll start cranking and start right up. Any ideas what's causing this?
Thanks
Joe

Look for loose or corroded battery cables.

Bad starter. Almost definitely. The only other thing it could be is a bad switch. Next time try jiggling the key while holding it in the start position. If that seems to improve it, it might be the switch.

Turned out to be a bad battery.
Joe