Originally Posted by benzaddict SG

Well it sounds like we're getting there. First, go to the module box on the passenger side of engine compartment near the windshield and lift up the cover. There is a vacuum switch-over valve that controls the upshift delay and it has a green vacuum line that comes out of the valve and goes across the firewall and down to the trans. Take the green vacuum line off at the switch and test it with a vacuum pump and see if the vacuum pod leaks, it probably does. If so you will need to replaced the entire cable assy as the vacuum pod is not available seperate. Also check the other vacuum line going to the switchover valve(I think it's black/grey?) and make sure you have vacuum present(it is the feed), if not follow the line to the engine and make sure it's connected and not cracked/broken along the way. Your car has a vacuum block in the same module box area which is a junction block that feeds the locks, climate control, etc.. and these leak sometimes. There is also a vacuum reservoir that sits behind the passenger side fender that cracks sometimes giving a bad vacuum leak. Hope this helps, good luck.