Cm871 randomly shuts down

[Brett389]

I have a 389 with a cm871 has been deleted for 8 years. A few months ago I was loaded going down the hwy and it shuts off like you turned the key off, I pulled over checked for loose wires and bad connections found nothing so I changed the fuel shut off seloniod that didn’t help but I was able to get unloaded even tho it shut off a few times more and was able to get home. It’s totally at random so I’m thinking it’s a electrical ghost and l started to throw parts at it so I changed the key switch and got lucky that was 4 months ago and thought I solved the problem it didn’t shut off not one time until yesterday and doing the exact same thing. I searched the internet and found one guy that had exact engine with exact problem and a new ecm solved his problem