I need help, I have had a 1975 200 4 door Comet rusting, I mean resting, peacefully in a shed for probably 10 years. Before that it was a semi daily driver. My daughter is 15 and wants to drive it when she turns 16. I did what I could think of as far as getting it running, new plugs wires, oil, battery, fuel filters, cleaned the gas tank out, nasty, new fuel line the old one leaked, and a new starter solenoid, the other one had magic smoke coming from it. It came the day to turn the key to see what happens. It fired right up, my daughter was grinning ear to ear, rev that baby up a little, great. Mechanically everything seemed fine, until she turned the key off. It kept running, I guess since it had sat for so long it didn't want to miss its chance. Pulled the key out and it kept chugging along, and not like a Riesling chugging, it purred like a kitten until I pulled the battery cable off. Can't keep a good Comet down. What am I missing, what do I need to check? I had a couple of people suggest it was the ignition switch, changed that today, same result. If anyone out there in Maverick/Comet land has any ideas please help me.