The pump is new, so I don't think it is low-pressure. What I think happens is when you turn the car off and the pump turns off, the fuel pressure drops too low due to a leak. It could be a few things that cause it, but most commonly, it is a leak or leaky fuel injector.
So, when you check this, we need to pay attention to the pressure when the key is turned off. It will slowly drop to a point, but it won't be too much and will take a bit of time.
Let me know if that helps or if you have other questions.
Tuesday, November 7th, 2023 AT 7:26 PM