Hey guys please help been stuck for a week with this issue

[alborz]

(04-13-2022 )09Pete386 Wrote:  So I got back to my truck started it up and let it run until it turned off on its own again, then went on doing what Rawze said to smack on top of the Ecm, and it shuts the pump off, I let it sit for a few minutes started up the truck and smacked the Ecm again and truck turned off again, so then assuming it’s the Ecm now, where can I buy an Ecm that wasn’t remaned?

Did you solve your problem?
If yes what was the cause?