OK, here's what I've learned since yesterday. Vacuum coming from the valve on IP was 13" at idle. When I revved it up quickly it dropped to zero. If I steadily increase the throttle it was 7" at 4,000 rpm. I didn't have the heart to rev it any higher. I backed off the modulator (sorry Brian, this was befroe I read your post) and I think there's some improvement, but it's still pretty stiff. I had read that it might be desirable to change the orifice to soften this shift. I'm not even totally certain which component the orifice is --- sorry, this is all new turf for me. Is it the green cannister looking this coming out of the IP valve?

__________________
John Schroader
bio burnin' 83 300D, '83 300 SD, '79 240D
"I've never met a man who was good at making excuses who was good at anything else" Ben Franklin
"You cannot permanently help a man by doing for him what he could and should do for himself" Abraham Lincoln