Car turns over but will not start and it is not
I had this exact problem happen to me 5 days ago. Here's my solution, I hope it's yours as well...
Directly behind the left headlight, there's an air intake. The enclosure holds the air filter. Make sure the filter's not clogged. If it's marginal, replace it. On top of this enclosure, is an air proving switch. If there's not enough air to open the flapper within, it will prevent your engine from running.
Downstream from this device is an oval duct, made of plastic which runs over the top of the engine. This duct is attached to the next device with a pipe clamp of sorts. Mine was loose, and the duct was detached, so air was not being drawn through the duct, thus, not through the air proving switch. Once I placed the duct where it belonged, and tightened the clamp, I was golden. The car performed like new.
Took me 2 days to figure it out, but there you go.
Take a look to see if it's the same problem and let me know.
1986 Alfa Romeo...
on Sep 12, 2010