1999 Ranger cranking but not starting

[Payne@abstract-logistics.]

Truck ran fine last Wednesday, I parked it and didn't use it for 24 hours. Drove it the day after and it was misfiring, I took it to O'Reilly's and got new sparkplug wires and sparkplugs. That improved it but it didn't fix it, so I got it home and then took it back the next day to replace the ignition coils. I unplugged the battery while doing that for peace of mind and to clear the codes. After I replaced it and plugged all the spark plug leads back into the correct spots, I tried to start it and it wouldn't start. The battery was dead so I got a replacement, but that didn't fix it. I have replaced the crankshaft sensor and I have good fuel pressure. Sparkplugs spark when tested on the frame. I have also tested the injector pulse and it is good. I do have an aftermarket auto start, and security system installed but I have unplugged them both. The pats system does not appear to be engaged. Any help would be appreciated