How to start a stubborn Fuel Injected engine?

I recently bought my first fuel injected vehicle.  Its a 1990 Ford
truck.  I have always had carbs in the past.  I have not driven this
truck for a month.  It always started just fine, but for some reason
it wont start.  It turns over but wont "pop".  I added a can of gas,
because the gauge was low, but its not out of gas since I added the
can.  My question is how to start a Fuel Injection vehicle that wont
start.  On a carb, I'd spray a little starting fluid, or even pour a
little gas in the carb, but is that possible on a F.I. engine?  
We have had very cold (zero) weather so that may be part of the
problem, but it is warmer now and in the mid 30s.  I just wanted to
run it for a bit and also move it before it gets snowed in again.  

What do I do.  I guess I could use a little overall advice on dealing
with F.I. engines that wont start.  I've dealt with carbs for the past
30+ years, but this is new to me.

Thanks

Forddriver
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