The Analog Baron simulates many features of real world fuel injected engine operation that some users may not be familiar with.  Understanding the checklists for hot, cold, and flooded engine starts should provide a successful engine start.  Recall that fuel injected engines must be primed with an electric fuel pump before starting, and may succumb to vapor lock after recently running.  Flooded engines will also be difficult to start, requiring an advanced throttle setting to produce a combustible air-to-fuel ratio.