Hi Scotty,
I have a Smart Fortwo 2009. It overheated, and it wont start again. It cranks, but it wont start. I tried the fuel pump, it pulses gas throw the injectors. The spark plugs are sparking. Tried starting fluid, but it didn't start it. Maybe the camshaft/crankshaft position sensor? What else might be? Thank you!

odds are you blew the head gasket. Do a compression test of the engine first to see if that's the case https://www.youtube.com/watch?v=ovvXnd7AhiU

In your video you said that the engine must be hot to preform this test. Now my car that won't start, what should I do?