84 NA Running Rough, Idles Fine

[AutoTechInc]

Ok, i am completely stumped... I am praying that ive been overthinking this whole thing.

Car has been sitting since 2007. Fuel system drained, filter replaced, injector seals replaced. Went to go start car, fired up on the first crank! Idles good, applied throttle after it warmed up, dies out.

Seems like major Vacuum leak, smoke tested and its pouring out the cam cover. Replace cam cover seal and gaskets, intake manifold gaskets, and checked injector spray pattern, no more major vacuum leaks.

Still has same issues.
Timing is dead on
Fuel pressure perfect
Great compression
TPS Verified working and swapped
Air Meter Verified working and swapped
ECU Swapped
Coil Swapped(Has aftermarket wiring hooked up)
Plugs/cap/rotor all in good shape
Wires from DME to TPS and AFM checked

Have spent a week on and off with this car and honestly cant figure this one out

[Jfrahm]

Did you observe the fuel pressure under load?

An inline spark checker can help, you may see spark failing under load. It's a lot easier to spark in the much lower cylinder head pressure at idle.

If there is enough potential fuel delivery and a strong spark, the air meter could be stuck (though you said this was replaced) or there could be a problem with the mixture, maybe a bad DME temp sensor.

It'd also be worth watching the injector pulse via a noid light or similar to see if it is tracking RPM and load.

An easy test would be to use a squirt bottle of fuel or an unlit propane torch to see if it'll rev up more with more fuel.

A cracked J-boot might also cause this issue.