You've still got a vacuum leak, and it's connected to one of the thermovacuum switches.
There are two switches that screw into the intake manifold of the car. These are both controlled by engine heat. When the engine is warm enough, the switch opens and allows vacuum through. The pipes coming off these switches is small, brittle, and easily broken. It's a common failure point.
In case you haven't already, get yourself a MityVac hand vacuum pump. The lines in these cars can look flawless and still leak like a sieve. The only way to be sure is to connect a vacuum pump to them and verify they hold vacuum. That hand pump will be the best $30 you ever spend on this car.
Friday, September 24th, 2010 AT 2:04 PM