Caldina model 1azfse. Started, allowed it to idle, then why did it shut off and could not be restarted?

hot engine or cold, or both? 180F+ is hot.
Shuts off, idling or on the fly, say at 30mph right foot down it dies?
just clue here...
engine stalls. is complex. but in the macro its below, using tools finds the reason,, but you never said did it restart easy./??????
1: lost of engine compression hot engine, (or overheated)
2: lost 12vdc electric power at stall (caused it) dash goes dead. ?
3: lost spark, test spark at the failure point. if dead trouble shoot speak.
4 bad fueling, too lean (say the fuel pump dies) or too rich.
too rich causes wet spark plug tips. (lots of causes )
5: stalls due to idle RPM too low, below 800 is too low.
too low idle rpm is caused by many things, but top 2 are.
A: EGR stuck wide open, clean it, as the books shows at 60k miles
B: ISC stuck closed. (same deal clean it)

now repost and say when it stalled,
at a read light or flying up a hill wot, wot= wide open throttle.
and when it dies, is the restart easy or hard.

I have ran into problems like this, so I replaced the ECM and that fixed the problem, you can try this, may help.

Check the spark plug wires... idle after dark... look under hood, rev it up and see if you see any spark jumping from the distributor or wires to plugs.

Check the fuel filter, may be plugged allowing only enough fuel to idle. Electric fuel pump may be shutting down, oil level full? there is a corrolation between the two I believe.

pres.reg.or TPS

Try checking all your vacuum lines first

does check engine light come on

Misfires are caused by loss of either spark, gas, or compression. Most likely you have lost gas. Spark is normal? Compression is probably okay. Check your fuel pressure-especially when it has stalled and won't restart.

this year model is notorious for fuel related probs...check the remainder of the fuel system, injectors, and the fuel pressure regulator also verify that the fuel pump is actually running and getting the correct amount of power to the pump itself..... it may not be bad just not getting enough power

Try the idle air control valve it is located near the throttle body it has a four wire plug and has two small hoses attached to it this is a small stepper motor that controls the amount of air on start up this part will cost about $200 from a popular auto parts store.

Check that the Idle air controller is not faulty, disconnect it and start the truck again, if the truck starts (running poorly) then replace the IAC.