More then likely this is a fuel pump issue. However, here is a guide that will talk about this issue in more general terms:
https://youtu.be/dCjmRL3p4Cs
Then we need to test the fuel pressure and make sure it is okay. I suspect it is not you will need to replace the pump.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
When you use ether in the intake, you are introducing fuel so if it starts with that then it is a lack of fuel that is causing this.
Here is a guide that will help with replacing the pump:
https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump
Also, I attached the process below on how to replace the pump.
Let us know what the pressure is and if it is low, I would go ahead and replace the pump. However, if it is 0 and stays 0 when need to listen to see if it comes on. If it doesn't come on then we need to check for power but we can get into that when we know the pressure. Thanks
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Thursday, February 4th, 2021 AT 6:01 PM