I took the car for an M.O.T, did a emitions test car stalled on high revs and it woudln't start.

I put new cam sensor in I also put a new crankshaft sensor in. The car runs lumpy without air filter on it put the air filter back on and it wouldn't start at all. I changed the throttle body and the auto-choke but have no idea what is wrong with it!

Can you please help?