Idling/Vacuum Revisited

[Cory]

Hey again everyone. Started doing my own "studying" on my car, reading my Haynes manual, tickling the vacuum concept you guys have mentioned. Things that I read in the manual point to the fact that the air pump is running. Now, my father and I don't have that connected (its on, but no belt to run it) we'd figured we'd ignore it, due to its merely another emissions device to make the state happy. But anyways, reading the manual, some of the other emissions devices that I need to run the car (vacuum hoses) rely on the air pump, correct? So, in essence, if I hook up the air cleaner, it ought to help the vacuum scenario, so long as I get the vacuum hoses in the right places, which I also have to do, but some seem to be in place. Still ought to find a schematic/diagram. I did find one diagram showing a device with 5 holes looking similar to this

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its located near/on? the manifold and under the carbuerator. Let me know if you guys need any more information, as I will try to provide you with as much as possible, and all your help has been greatly appreciated, past, present, and beyond!

Cory

[Jeepzilla]

I think your picture is the CTO (coolant temperature override) switch. It is mounted into the water jacket. It senses the coolant temp and routes vacuum. When the engine is cold, it primarly provides additional spark advance. As the colant temp increases, the valve opens and advance returns to normal. It influences other things, too, mostly for cold-running driveability.

The air pump injects fresh air into the exhaust manifold in order to burn more hydrocarbons before venting to the outside. There will be a hose running from the pump to a diverter valve and other switches and valves, one of which is the CTO. The air injection system is bypassed when the engine is cold and activated when warmed up.

If you are going to modify your emissions system, get a shop manual, understand the interconnections thoroughly and then begin. Don't be surprised if you run poorly. Sometimes it is better to fix it right. Give a hoot-don't pollute!

[Va-Rob]

I have to agree with Jeepzila. As long as everything is inplace it would be simplier in the long run to fix everything corectly. An 82 is a lot eisier to dealwith than my 90 wag. get a good book and figure out what you need.

Rob