Vacuum leaks suck! I know that the M-body Chryslers were notorious for vacuum connector leaks. The rubber/plastic connectors did deteriorate in many cars of that era and you would have a problem with vent doors directing the air around the cabin. When you take a look at it, try to find a diagram of the vacuum system for the interior to see if there are disconnect points. Normally the plastic vacuum tubes would hold up but the rubber connectors would not. I've had to refashion a connector from new rubber vacuum hose (1/8th" inner diameter usually) to correct the problem.
Good luck!
|