what is this massive hose, wy is it disconnected, and how is my car still running???
looking around the engine bay today and I notice something horrifying looking.
at the junction relatively near where #7 is pointing to, there is a hose that comes down and connects with the engine or carb (not sure which it is). at least normally it would. mine is cracked and broken clean. this looks like a hefty hose that would be somewhat important, yet the car still runs with it being completel disconnected??
I'll post some pics tomorrow.
but what the heck is it?
That hose draws warm air from around the exhaust, keeping the carburetor from icing on cold days. This is from about.com:
The Air Intake System
by Vincent Ciulla The Air Intake System
Last time we talked about how the fuel got to the cylinders. This time we'll talk about how the air the fuel needs to burn gets to the cylinders. Since all manufacturers do things in a different way, we'll look at these systems in general.
For an engine equipped with a carburetor, this is pretty straightforward. Air comes in the air filter housing, passes through the air filter, into the carburetor where the fuel is mixed with it. Then it passes through the intake manifold and is drawn into the cylinders. The most advanced part of the system was an Air Temperature Sensor in the air intake. It was used to measure the air temperature and, by opening and closing a flap, allow cool air in through the air horn or heated air piped in from around an exhaust manifold. This was to prevent carburetor icing that would cause the car to stall and die out. It also facilitated vaporization of the fuel into the air stream.
Very simple and straight forward. There was only one draw back; there was no way to accurately measure the incoming air for the proper fuel mixture. You could use an emission analyzer and adjust the fuel mixture, but that was only at idle and not under a load. At higher speeds the mixture would be incorrect. Some automobile manufacturers recommend adjusting the carburetor on a dynamometer with the engine under load.
criard,theres alot of information online about automotive basics and searching on google would help. You cant expect everyone to teach you by spoonfeeding you, you gotta take some initiative of your own too.
I tried googling and searching around for 'hot air intake' and found nothing. I searched on about.com as well and found nothing. I asked because I knew one of you would know better where to find it, as opposed to me searching for hours with the wrong terms
uhh I gotta take some initiative on my own? I think becoming interested enough in how my car works to become a member here and post questions and pictures IS taking quite a bit of initiative.
I've read through most all of the repairs manual available on autozone.com for my vehicle. they simply neglected to mention what that part was or how it works.
no hard feelings, thanks for the help finding some info!
but back to the other question. do any of you think that moisture getting in open hose could cause problems with fuel mixture?
[/quote]do any of you think that moisture getting in open hose could cause problems with fuel mixture?[/quote]
Not likely. It just draws in air. There is another one drawing in cold air leading from the air cleaner to the front of the vehicle and it is wide open. The air filter will catch any moisture that comes in.
As for the initiative, well just being on a forum and asking questions imho isnt enough. By some books on automotive 101, they have some awesome books around. Thats how I started, well I actually started a long time ago by hanging out in garages. But I've been actively doing this from about 98-99 and professionally doing this for 3 years now.
I agree Flash, just asking questions isn't enough. like I said I already read through most of the repair/maintenance manual from autozone.com. part of my asking about this part was hoping to get referred to some great info website or something of that nature where I could read more in depth about how things work. now that I have a name to look for, I can get down to some good reading! thanks!!!!!
and thanks to you and everyone else for helping me figure out how this part worked. I was thinking the disconnected part left a big opening in the side of the carb itself, which is why I was asking so many q's.
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I miss carbed cars. 
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