So I’ve replaced a bunch of parts, only because it happened to me in my civic, I’m working on my girls 2004 Ex civic sedan, it runs for a second maybe 2, replaced Map, TPS, Fuel pump, I have a IACV in trunk just haven’t installed yet. All fuses are good.

KEY NOTE, Cars was sitting for about a year.
please help,

im letting her drive my accord while i fix hers.
TIA

could it be the main relay going out? Should I check the the IACV ? This is the first civic to give me an actual headache while working on it. I’m stumped.

I have a video attached to show what it’s doing. I’m stumped.