Hey the girlfriend's 2008 fiat 500 1.3 multijet diesel was giving a glow plugs fault ,she got them changed and the fault is still showing up anyone any idea what it might be causing this, car occasionally just loses power and chugs but is fine once you restart the car ,had it on computer and it shows a bcm fault , she also had the boot wiring redone but boot light doesn't work until I put a ground on it but then doesn't go off , could.all this be connected ? Any help would be great thanks.