This problem has happened twice in two or three weeks on my 92 Eldo with 113000 miles. Normally, the car always starts up right away. I only have to tap the key and it'll fire right up.
Twice, when I tried to start the car and put the key in the ignition and turned it, everything was dim and the volts were at about 8. The starter either wouldn't engage or it might've clicked once. If I left the key in the on position the volts would gradually climb to 12 but then I would try to start it, the volts would immediately drop. This would happen repeatedly.
The first time this was happening, the car eventually started after a while. The second time, I had someone hitting the starter with a wrench and it eventually started.
I'm guessing it's the starter but could it be a bad ground or something?