This nice gentleman phoned me today. I asked him if he was using this site as a help. Told him it was the best site I knew of for cars of his type and meant it.

I did explain as well that vacuum was probably present on the shutoff when it should not be in all probability. Plus just pull the vacuum line to verify. One of his describd situations more or less verified it to me as the likely cause other than the obvious.

Then quickly suggested a few things but had to leave as well then so we terminated the conversation.

I am happy to notice he is using the site as well. It can make hard easy. A kinked vacuum hose could make release of the vacuum too slow. Or the vacuum switch portion of the ignition switch is only slightly opening. A vacuum hose mix up is a better candidate though as mentioned. Although it should not slowly self bleed down with a little time when the car is running. With a new vacuum pump the vacuum is probably strong as it should be.