Hi,
Wow, you have done a lot of work already. By chance, did you try resetting the inertia switch? This one is located in the trunk, passenger side. See pic 1 below.
If you have already tried that, do you hear the fuel pump run for a second or two when the key is first turned to the run position? Have you checked to see if the fuel pressure at the engine is within the manufacturer's specifications? If not, here is a link explaining how it's done:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Since it starts with starting fluid, that certainly indicates a fuel-related issue. So, let me know if there is pressure to the fuel rail. If there is, we will need to check the injectors.
I will watch for your reply.
Take care,
Joe
See pic 1 below.
Image (Click to make bigger)
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Tuesday, March 29th, 2022 AT 7:36 PM