Whats up guys, this is my first post and im having some issues with a car i baught. Its an 88 hatch with a y8 vtec swap, car has an obd1 ecu and wiring, cold start is perfect, car drives perfect through every gear but turning on my headlights, pressing brake, or flashing highbeams the car goes from idling fine, raises up, and shuts off sometimes. Anything putting load on motor makes it die i am stumped i did a tune up and checked alternator and battery both good. Any help would be awesome, i also have a video link showing the problem.

 

IACV ???

 

Replaced it and did nothing

 

Inspect all your ground points