On a 2.0 4 cyl, I have a few emissions type components that I have no idea where they hook up to. there is a tube that comes out of the engine block just above the exhaust manifolds, and in the middle of cylinders 2 and 3. the hose on it, was chopped off, so I have no clue what it goes to. there is another tube that comes out of the cat converter, it ends pretty close to the other tube, and I dont know what it hooks up to either, and cant even find my manuals here to work on it, and figure it out.

I guess my question, is what do I put on those tubes, and where do I hook em up to?

 

From what I can see it sounds like those tubes are for a air control valve. It looks like that valve controls flow to your air or 'smog' pump. It looks like it should be on your vacuum sticker as 'ACV'.

 

only problem I have, is there are no stickers on this thing, plus the guy who owned this truck before me, took a LOT of stuff out of it.

 

What year is the truck? I have some very small diagrams I am looking at, and it appears that the the two tubes go to an air control valve which feeds exhaust gases back to an air pump that should have a pulley on it and should be moved by the drivebelt.

 

its a 1982 ranger, the engine as you know, is the 2.0L I4. maybe that will help some with this, I'm not totally sure ,but I hope it does. if thats what you're looking at, maybe you could help me some, and send me a copy of the diagram if its on the computer already.

 

Here's a link that may help you:

http://www.tinyurl.com/8mxzu

There are links there to vacuum diagrams beginning with model year 1984. Click on one and see how similar it is to your setup.

 

That didnt tell me anything, though I do appreciate your help. anyone else know anything about this??

 

My Ranger Chiltons manual describes the system reasonably well, that is what I was looking at. If you can get ahold of one it'll tell you what you need to know. I wish I could describe it better, but from the little diagram I looked at and from what I read about the 2.0 it uses the thermactor system to curb exhaust pollutants. My manual says:

"The Thermactor emission control system makes use of a belt-driven air pump to inject fresh air into the hot exhaust stream through the engine exhaust ports. The result is the extended burning of those fumes which were not completely ignited in the combustion chamber, and the subsequent reduction of some of the hydrocarbon and CO content of the exhaust into harmless CO and water.

The Thermactor system is composed of the following components:
1. Air supply pump (belt-driven)
2. Air bypass valve
3. Check valves
4. Air manifolds (internal or external)
5. Air supply tubes (on external manifolds only)"

The diagram I have shows an air tube leading from the air pump to the air bypass valve and two lines leading from the valve, one to the cat and one leading toward a check valve back by the engine. I wish I could help more but this is all I've got.