Mystery problem starting my car after alternator replacement? Fuel pump switch? on 1999 Ford F-150 Lightning

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First the Alternator went out. I put a new battery in and even before I changed the alternator, the starter would spin but I could not start the car.
Now 2 weeks after a new alternator is in, I have the same problem again with starting?
This truck has always started at first asking until now?
(2) Answers
(2) Comments
you need to check and see if it has spark and fuel. a fuel pressure guage will test fuel and a spark testor will spark condition. start there as you will find one of them is not working.