I am missing a vaccum line from the distributor on my '84 323i. There is one there that goes to the throttle body, but the other is missing alltogether. I think it is the ignition retard since have to have my idle dialed all the way back just to get it to idle at 1100 rpm. I have re-timed it in hopes of making it run smoother. It helped, but it isn't quite right. Any Ideas?