Help! The weirdest thing started happening today...

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Originally Posted by CTScott

Typically resetting the ECM is not necessary with plug replacement, but you can try doing so by disconnecting the battery for a minute. You can also try cleaning the throttle body and MAF sensor.

For testing the torque converter, the thing that would fail with it causing stalling on start is the one-way-clutch within it. Testing that requires pulling the torque converter out of the tranny.

I will check into cleaning the throttle body and MAF sensor today. I'm not sure about the torque converter though - its not stalling on start, its stalling when I pass through neutral into drive (unless I feather the gas when shifting) or back through neutral into reverse or park.

I showed it to a former mechanic coworker and he thinks it sounds electronic. There are no sounds to indicate an issue, the motor just dies. Like it does't know how high to idle in neutral so it shuts off.