so i have a s13 with a blacktop s13 sr
mod list:
walbro 255
megan turbo manifold
isis front mount
isis aluminum radiator
single cam maf
spec stage 3
spec billet flywheel


so the car surges under like 10 vaccum, its not to bad when the lights arent on, but when you turn the lights on its horrible. so i started the car and unhooked the neg cable and the car ran until i turned the lights on. so i think my alternator is going, but would this be the cause of the surging. Ive had problems with my maf as well because the wire has been spliced. i think that its causing a shitty connection because of outside interference with the maf. and the front mount has been prone to boost leaks (isis...)
so you guys tell me, why would the car be surging like this?