I put a new up pipe and MAF pipe on my 86GN. Got rid of the BOV. Took car for a test drive sputtered and killed. Started back up sputtered all the way back home. On the BOV was a vacumn hose running to a t a hose on the fire wall of the vehicle. I replaced with a straight hose did I need that t and was it suppose b attached for a vacumn. Oh the hose is also has another t with a hose that is attached to the line above the fuel rail.