NOT A PERFORMANCE QUESTION!!! lol let's not go there again!

'94 4.0L OHV V6, 5 speed manual

Ok I was thinking of pulling my tube leading from behind the headlight to the air box completely off...it's ugly and yeah I just want to.

I know running from the driver's side of it to one of the exhaust headers is a device designed to heat it up. I live in Texas, it gets freezing here every now and then during the winter, but I don't see a problem with removing this, is there one? I can imagine that air gets MIGHTY hot during the summer with the exhaust right there.

Also, on the passenger side, across from that little heater upper thing, there is a tube, looks like a vacuum line, I can't tell where it goes, it runs parallel to the tube backwards, then I can't tell where it goes. What is it and do I need it?

Thanks guys,

RP
Zach

 

We can go to performance questions, it is OK to do that~

 

It won't really hurt anything, but your mpg might be affected somewhat. The tube just provides warm intake air at the beginning of the run cycle. I've run my truck without one for years and it hasn't hurt anything. Of course I live in south Texas where the air is always warm anyhow. I don't know that I'd recommend removing either air hose, but I can't see that it would really hurt anything.

 

Tim most of missed some of the warm, loveing, and friendly performance debates of the past, they would make Iraq look peaceful ha ha. Were still recoperating from the last round!

 

[QUOTE=RangerPilotOk I was thinking of pulling my tube leading from behind the headlight to the air box completely off...it's ugly and yeah I just want to.
RP
Zach[/QUOTE]
As I recall, you have the airbox pretty hacked up, so why not?
Dono

 

Dono,

that's why I'm asking. There are a couple of things coming off of this aforementioned tube, the "warming" thing that heats up the incoming air, and this little tube on the other side. I wanted to know what they were and what to do with them prior to removing them. This tube has still got my stumped. I'm going to try and track it down this afternoon.

RP
Zach

 

Are you talking about the vacuume line (black with i think a yellow stripe?) on the other side of the one that goes to the exhaust manifold?

 

Does it go to the exhaust manifold? Yes it is a black line with a yellow stripe off the passenger side of the intake.

What's it do?

RP
Zach

 

that vacuume line is what opens the door to alow warm air off the exhaust manifold into the air box. it should get vacuume when the engine is cold and not when its hot. opening the passage to the exhaust manifold "heat riser"

 

So where does it go? I figure I can just cap the thing off where the line begins without and problems.

RP
Zach

 

it should go to a thermal switch but i dont remember

 

I just bought a 94 Ranger yesterday. The vacuum line you're talking about went to nowhere on mine. I looked all over the place and couldn't find where it hooks up. I finally went to my 92 Explorer, and it looks like it's the same setup. After looking at the vacuum diagram on the sticker, it appears that the small vacuum line going TO the air cleaner goes through the bi-metal thermal switch there. The hose you're talking about comes OUT of the airbox after the vacuum goes through the switch. It then goes to what I'm guessing is the "air cleaner diverter valve". The valve gives warm air to the air box, and when the air is warm enough inside the box, the bi-metal switch closes off the vacuum, and closes the valve. Combustion air for the engine then comes into the airbox normally. I'm guessing if the bi-metal switch is closed, then I don't have any vacuum leak with the hose not connected to anything. This is all new to me, so I may be wrong...

My diverter valve is completely missing...just a hole in the bottom of the airbox under the air filter. I live in northern Utah, and may need it this winter. If you remove yours, I'd be willing to take it off your hands.....

 

I tracked that vacuum line. It goes back to where you can't see it, then comes up top to the back of the airbox. I can't remember what I saw on the inside of the airbox where it goes in, and I don't feel like pulling the airbox again just to find out.

sjwoody, as soon as I figure a good way to bypass the vacuum system and make sure I'll pass inspection without it, I'll probably be pulling it off. I'll let you know.

RP
Zach