Vaccum leak could be doing this, u can try running your engine, and while its running, spray a throttle body cleaner to the gasket between your throttle body and cylinder head, if the car dies, there is your problem.

Also, somehting to look at is the wire behind the #1 injector, i dont have the spec but im feeling that that injector is not getting a b+ or ground and its not opening up thereby not supplying fuel to number 1 cylinder (near the timing belt).

Hope this helps.