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Originally Posted by franklyspeaking
You have verified my theory.....you have a vacuum leak in the 3/2 valve circuit, which when plugged or squeezed, allows the vacuum to build in the line going to the shutoff valve. I'm not sure what all that circuit does, but I know it controls the EGR valve....but not sure what else. If you have a mighty vac, it shouldn't be very hard to chase down the leak. It's either find it and repair it or separate the vacuum sources once more. Whatever, else the 3/2 circuit does, it probably hasn't been doing it properly...this includes the EGR circuit (which shouldn't be a problem).
Good luck!
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I will give that some attention. I have no vac to EGR, and only have a single 3/2 on the valve cover. One is vac in, one is vac straight to tranny modulator, and one is capped. The vac lines are not in the proper locations per info I have seen, but I had to put them where they are, then adjust tranny modulator for correct shifting. Perfect shifting, as a matter of fact. I guess when it had it's own 'T' off the line, it didn't rob the other circuit of correct amount of vac to turn car off. The only problem, which makes no sense, is if I leave line to 3/2 undone, and just hook up other lines (which is in same configuration as before me braking off check valve), it still won't turn off.
So, I have vacuuming to do....