I just bought a 91 EF with a z6 swap a few weeks ago. It ran fine until last week when I was trying to get it into my backyard to fix a few things. I had it up on wood ramps and it slowly died out. I went to turn it back on and nothing. I have checked for spark by taking a different plug wire with a plug and grounding it out while turning it over to see for spark. I have taken the intake off and sprayed gas straight into the intake manifold and have gotten it to fire up. So I know my issue has to do with fuel delivery. I took my fuel filter off and noticed a lot of brownish / black liquid coming out. I'm assuming the car had been sitting for awhile and didn't have the gas treated. I replaced the fuel filter and still nothing. I took the injectors off and cleaned them up a bit in seafoam but now I don't seem to have pressure. I dont think this is a main relay issue because the car starts when i spray gas into the intake manifold. Any help would be great I've been racking my head on this for almost a week now. I still have yet to test voltages etc. The fuel pump does turn on also and I did have pressure before i replaced the fuel filter. Thanks

 

Does it stay running when you spray gas into the intake? and I would check to see if you're still getting fuel pressure. Does your CEL go off after turning the key to the second position?

 

It says on as long as I keep spraying gas into the intake. Last time I checked for pressure I had none. As far as the cel is I think it stays on I would have to check that when i get home.

 

I had pressure prior to replacing the fuel filter and rail