You said you ran it with the coil wire off for a couple seconds.

Make sure you crank the car over while watching the oil pressure gauge.

Sometimes it takes maybe thirty seconds or so to build proper oil pressure up.

You may run the battery down doing so, but don't start the car until your oil pressure comes up on the gauge.

The pressure gauge is your friend.

I have ran down plenty of batteries trying to build up the oil pressure after changing the oil on the v-8's.