Since it is after clutch release, out of gear, I'd look at clutch sensor(or switch) and neutral safety switch. Both may be 5v or 12v ground reference to the pcm. Does braking affect it as the brake sensor(or switch) will be on a similar/same circuit.
MAYBE IE pcm thinks your braking with clutch engaged, so it kills engine power to assist in the stop
Gotta start where your symptoms start.
MAYBE IE pcm thinks your braking with clutch engaged, so it kills engine power to assist in the stop
Gotta start where your symptoms start.