Truck dies while idle

[utee05]

Hi all,
I have been scratching my head on this one. While driving around town my truck has died on me twice.

The first time it was while I was in line to park in a parking lot. The second time I was waiting at a 4-way stop.

Both times I tried to turn the truck right back on but it refused. I had to get a jump to get it up and running again. When I checked the battery voltage it was at 12.4 before getting jumped. When the truck is on the voltage jumps to 14.4 so this means alternator is good.

I will say that both times I had around 1/4 tank of gas so I'm suspect that it could be something fuel related. The reason is cause I was in traffic last night and the truck held up fine, though I had nearly a full tank of gas.

I replaced the wiring going to the junction block as it looked a bit worn at the connection. I replaced this after the truck died on me.

Mods done to the truck: headlight relay, aftermarket stereo.

Any clue as to what could be causing the issue? I checked voltages from starter to battery and ground and all looked good.