[George Maz]

Why not check fuel pressure at the plenum port first? ...before tearing into anything else which may introduce more unrelated problems.
Once you've determined fuel pressure issue, then you can work your way upstream to the fuel pumps and gas tank. If adequate pressure then proceeded downstream to injectors.

2 gallon / 1 bottle seafoam, is way too concentrated ...dangerous. Add 10 gallons of 93 after you've done these checks.

1990 Dark Red Metallic, only 181 made, wouldn't give up on it so quickly. Sort out the typical zr-1 issues, and you'll have a fun driving car this summer. This forum has a tremendous amount of support for owners, fixers.

My car had the fuel pump hose clamp loosen and fall off. It sputtered and quit. Took me half the day to figure it out, easy fix, after a few phone calls. Thanks to Marc Haibeck, got me running again!