Equinox
03-05-2005, 08:18 PM
I recently removed the AIV from my '91 240sx. I traced the two small vacuum lines back to the throttle body, removed them and put a rubber cap on the throttle body tubes. The vacuum line that was T'd into the intake was also removed and a rubber cap was placed over it. Lastly, I removed the metal tube that attaches to the exhaust manifold and replaced with a plug (Nissan p/n 14052-21R00). Now whenever I come to a stop, the car will idle at about 1500 rpms. After about 5 seconds, it drops down to 900 rpms and stays there. The only thing I did not plug was the hole going into the air intake box, but I did not think this would make a difference since it is before the air gets metered by the MAF. Any help would be appreciated.