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I finally found time to remove the throttle body and intake manifold. I expected to find it filthy, but instead it is pristine clean. Strange. I am still hunting a vacuum leak. When taking off the intake manifold, the vacuum tube to the fuel pressure regulator snapped at the point where it enters the "bellow" of the intake manifold. It may have been weak or leaking to begin with. I'm still going to clean the IAC valve and do some more smoke testing on the vacuum parts
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