Plug without anywhere to go

I changed the starter in my 96 Grand Am. No there is a plug that came un-plugged. I cant find where it goes. This is on a 2.4. Fuel injection plugs are there, egr is ok, throttle body has three plugs and they are there. What else could there be? The car wont start now either. Turns over but no fire.

OK I found the plug but still the car wont start. It turns over fine. Any ideas? I have to drive this car tomorrow.

how many poles does it have and what color? sounds like might be crank position sensor check under the oil filter for missing plug

Thanks.... it was the crank sensor. Even when I pluged it in it still did not start. I had pushed one of the metal clips inside the plug back out, so there was no connection on one wire. I fixed it and now it runs.