My car is starting without the key in it why on 1992 Buick Skylark

I stopped to get gas and when i got in to start my car it would not start so I took out the key and all my lights in the car started going off. When I got it jumped it wouldnt start with the key in it but when I took the key out it tried to start on its own 1 time then the second time it started while I had the keys in my hand and it wouldnt go off I unhooked the battery but it kept running then I turned on the air and it went off? Please help my mechanic doesnt even know what is going on?????

by in Tampa, FL on January 23, 2012
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1 answer
ANSWER by , January 23, 2012
DOES YOUR KEY HAVE A LITTLE BLACK CHIP ON THE SIDE OF YOUR STEEL PART