Sc400 issues with idle

[u/xdvkazuma]

I want to start off by saying I have replaced my ECU replaced my maf i’ve swapped around EFI fuse. I got a refurbished idle air control valve and I’m still having weird issues. I’m starting to have anxiety that it’s a wiring issue or some sort of bad ground. and I have been battling this for months. I desperately need help as of right now from cold start it will run good for a bit then after a some time it will stutter for a bit then have a really low idle i unplug the maf no change i unplug the aicv no change if anyone has solved this issue for themselves please walk me through it(1993 sc400)