I checked my fuel pressure running on my 94 vette and it is about 36 to 38 pounds. When I hit the throttle it dips a bit and then goes up to about 40 psi. The car stumbles under light acceleration and I'm trying to trouble shoot the problem. What should the pressure be at idle and when I hit the gas running????? I disconnected the vacumm line to the pressure regulator and the pressure goes up to 44 psi. Does this sound like a fuel pump problem? Any help would be great.
OMG, I have the same issue right now and just posted in another thread, "1/4 mile video, help with diagnosis". Any way, I don't know if you have a pressure regulator on a 94, but we think that is the issue with mine. I do have a 91 L98 vs your 94 LT1, but I think you have a pressure regulator.