1999 Infiniti I30 shuts off at stop

My car has been shutting off completely when I come to a stop. It happens randomly, but has been shutting down once almost everyday. I immediately turn it back on. It takes a couple tries, but then starts running again. No check engine lights are on. I have taken it to two different mechanics and they both said they are unable to operate on it until it dies complementary. i think it could be a fuel engine/pump problem.

Have the Idle Air Control valve cleaned/replaced.

https://www.rockauto.com/en/catalog/infiniti,1999,i30,3.0l+v6,1355756,fuel+&+air,idle+air+control+(iac)+valve,6072

The IAC valve is what allows the engine to idle anytime the accelerator is released when coming to a stop.

Tester