Help, I need help with my 89 Iroc Conv. The problem is: My car stopped running about a year ago. It turns over fine but won't start. I changed the Fuel filter, then fuel pump, completly dissassemble then re-assembled the fuel rail, and removed the pressure regulator. it looked ok, no tear in it. I tested the injector circuit and fuses are good, power is getting to injectors one the fused side. It will start if I spray starter fluid in it but only for a moment. I also swaped the computer, and coil. It is getting sprak but not fuel. Idid a pressure es and it was also fine, just below 40 psi.

Oh, and there are no ALDL codes displayed, code 12 returned on diagnostic check.