Security crank but no start 2009 camry

Can you provide a little history on this vehicle? What engine and transmission? What happened? One day you went to start her up? Driving....then the engine stalled and did not restart?

A 2009 Camry 2.4L 4cyl automatic 99k. Itcranks and dont start sometimes. I changed the fuel pump,. I PLout a used pump from the junkyard, it ran fine, then the next day it wouldn't start. So I checked the coil at cylinder #1 and it fired but the plugs was cruddy so i changed them all. I ran fine after a 40 mile riad test. I start it and drove and shut it off a number of times to make sure. I started the next day which was yesterday and drove it to church. Then i went to a store afterwards and when i got in to gi home it wouldn't start. After about a half hour it started and i drove it home.

Do you know how to use any automotive test equipment? 12 volt test light....volt meter......Scan tool? Any warning lights on or flashing when the engine is running?

R1h....did you ever resolve the issue with this vehicle?