Hi,
Based on the symptoms, it certainly is a fuel-related issue. Now, have you checked fuel pressure since the new pump was installed to confirm it is working? If not, that is where we need to start.
Here is a link that shows in general how to test fuel pressure:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
If you find the fuel pressure is within the manufacturer's specifications, then we need to check for a fuel injector pulse.
Here is a link that shows how that is done:
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
Let me know what you find. Also, let me know how this problem came to be. Did the engine just stall? Was anything other than the fuel pump worked on?
Let me know.
Take care,
Joe
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Thursday, September 9th, 2021 AT 6:47 PM