Maybe. This state has a function now at the emissions testing online site that allows you to pull the vehicle history. It has a tradition of failures, then retests where it passes. It did pass last fall, with slightly fewer miles on it.

I printed the vac hose diagram from the ASA program. Things don't look so familiar. I did find one line that was connected wrong, and two ports that were uncapped and potentially drawing vacuum, so I put tape over them for now. It doesn't seem to run any differently, but that's not very revealing.

Then I got to staring more closely at the engine. Keep in mind, it's 105 outside and I have no garage or shade and the truck's been running, so I limit my time under the hood. One glaring thing that struck me, and I don't know why I didn't see this before: the engine should have a thermo-valve below the thermostat area with vacuum lines connected to it. It's broken off, as in, there are no lines anywhere near it, and no place to attach them. There is a fitting screwed into the place where it should be, but nothing else. What's even stranger is that there aren't any lines that look like they should go there.

This is quite odd. Investigation continues.

John B.