I dont see that you stated how the car runs/ran when you sprayed fuel at the throttle body. Will you please tell me how it runs when you are doing that?
Is it gasoline or starter fluid?
What do you use as a sprayer?
Do you open the throttle plate and spray it in the plenum?
Have you had it run using this method since you changed the distributor?
Have you had it run using this method sice you began swapping Feul parts?
By this point I suggest installing a pressure gauge after the Filter and before the Injector Rail and watching it as you mess with something else.
Have you replaced the Filter?
How many miles are on the engine?
How long have you driven this car with no problems?
Have you had recent work done of any kind, fluids, jumpstart, airfilter, anything?
***
I would look at the intake hoses for a air leak and take a rest on the pressure worries. The "acordian" flex neck near the Air Flow Meter fails in clever ways. Removing it and using your fingers to CAREFULLY search EVERY fold and curve.
***
ALL of these questions are valid when trying to get help from thousands of miles away.
