Another no start

[Swanee]

A few weeks ago I started my truck in the morning and there was one little hiccup, but it started and ran fine. The next day I started it and there were two little hiccups, and it started and ran fine. It sat over the weekend and the next time I tried to start it, it tried to fire but wouldn't. I tried to fire after normal cranking time and then wouldn't, just kept cranking a few seconds before I gave up. That afternoon after work I tried again, giving it throttle when it tried to fire and it started very rough for a few seconds before it smoothed out, then it ran fine. I pulled it up into the driveway and there it's sat ever since. I had the codes pulled and got a crankshaft sensor code. The guy who pulled the code said that he has seen that code after repeated cranking and no start efforts and to check the FICM. I checked the FICM per the instructions in the video on circuitboardmedics and got 48+ volts, even though the engine wouldn't crank by this time. I disconnected and charged the batteries. I have the 7 screw FICM. Got a new sensor and changed it out this morning, but still no start. It tries, but gives up before firing. Anyone got any ideas or suggestions? I'd like to get it fixed without having to have it towed. Driving the 94 now...
Thanks,

[SteveBricks]

Are you getting fuel in the upper filter bowl?

[Swanee]

I'm gonna change the fuel filters today and I'll see then...
Thanks

[Swanee]

This may seem pretty basic, but is it safe to put on a battery charger without disconnecting the batteries? That way they'd both charge evenly and at the same time, but I'd sure hate to fry something expensive.

[Samuel1941]

Jim.........
It's OK, charge away!

Connecting a charger is just like adding a third, healthy and stronger battery to the two battery network already in place.

[2 Stroker]

I got the battery tender plus and hard wired it in to the passengerside battery when it sets for a week or more it is on the charger.
2 stroker